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Thread: The TZ-UK British Summer Time timekeeping challenge

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  1. #1

    The 2019 TZ-UK British Summer Time timekeeping challenge

    NB - if entrants could do a fresh reply for each update, it'll be easier to keep track of new info, many thanks :)

    -----Final scoreboard-----

    Here are the final scores, sorted in class order:




    and also sorted by time variance:




    More analysis can be found towards the end of the thread.


    Notes
    VTD = variance to date, updated weekly i.e. individual watch variance, in seconds from entry offset to latest posted offset.
    Info will generally be sorted by latest reported timekeeping by class (then alphabetically).
    Yellow shading indicates no update from the member for a couple of weeks. For date of latest leaderboard update please check edit data for this post, with apologies for any delays.




    -----Original Post / How to Enter-----
    When the clocks (and watches) change this weekend, I thought it could be fun to try a bit of an accuracy challenge. A quick-n-dirty suggestion as to how it might work below, but I'm sure there could be some better suggestions between now and tomorrow night....

    1. Sometime w/c 31 March, post a picture on this thread of your challenger watch beside time.is so that the time is visible on both. Identify the category your challenger is entering (HAQ, Quartz, Spring Drive, Electric, Mechanical >£1k market value; Mechanical < £1k market value)
    • Multiple entries no problem
    • The watch does NOT need to be worn throughout BST (as long as you can keep it running that's fine)
    • Should the challenger watch stop during BST, you're out! (post your excuses here)
    • I'll update this post with the leaderboard as and when.

    2. Feel free to periodically post updates on this thread(again, watch and time.is screen together) with explanations, excuses, etc
    3. Sometime w/c 20 October, post a final picture on this thread (again, watch and time.is screen together)

    Obviously quartz will have a natural advantage if only insofar as it's less likely to stop or need looking after if in rotation, but I would certainly love to see mechanical challengers in the mix too!
    What do we reckon ? Anyone interested ?

    (By the way, this popped into my head because I regulated my quartz GS this week, so I think I've a bit of a chance myself )
    Last edited by JGJG; 29th March 2020 at 09:22. Reason: Leaderboard

  2. #2
    Heresy! One cannot wear one watch in all those months.

    But I'll attempt it with my GS Spring Drive as it's got a decent power reserve.

  3. #3
    Master sean's Avatar
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    How about different categories: High-accuracy quartz, quartz, mechanical?

  4. #4
    Quote Originally Posted by KingKitega View Post
    I'm in! Will be submitting my SBGN001. It's lost 0.2s since November.

    Sent from my EVR-L29 using Tapatalk
    Cripes. My SBGA041 has managed to gain 0.25 seconds in a day. Perhaps a pre-bail is in order

    - - - Updated - - -

    Quote Originally Posted by sean View Post
    How about different categories: High-accuracy quartz, quartz, mechanical?
    Spring drive separately too as it's mechanical but rather beyond those, but also not quartz.

  5. #5
    Quote Originally Posted by hughtrimble View Post
    Cripes. My SBGA041 has managed to gain 0.25 seconds in a day. Perhaps a pre-bail is in order

    - - - Updated - - -



    Spring drive separately too as it's mechanical but rather beyond those, but also not quartz.
    Spring drive is quartz with a shit battery.

  6. #6
    Grand Master dkpw's Avatar
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    I may not be in front of my computer tomorrow, so I'll update today which is 6 days in. One second fast.


  7. #7
    Quote Originally Posted by sean View Post
    How about different categories: High-accuracy quartz, quartz, mechanical?
    Quote Originally Posted by hughtrimble View Post
    Spring drive separately too as it's mechanical but rather beyond those, but also not quartz.
    That sounds very sensible...

  8. #8
    Thomas Reid
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    Does it have to be a wrist watch? ;)



    Best wishes,
    Bob

  9. #9
    Master petethegeek's Avatar
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    Quote Originally Posted by rfrazier View Post

    Have you compensated for height above ordnance datum?

    https://www.wired.com/2007/12/time-hackers/

  10. #10
    Master
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    I'm in! Will be submitting my SBGN001. It's lost 0.2s since November.

    Sent from my EVR-L29 using Tapatalk

  11. #11
    Grand Master Der Amf's Avatar
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    Another category: sub-1k mechanical

  12. #12
    Quote Originally Posted by rfrazier View Post
    Does it have to be a wrist watch? ;)
    I think you provided your own answer there Bob ;)

    Quote Originally Posted by Der Amf View Post
    Another category: sub-1k mechanical
    Yep, great idea
    Last edited by JGJG; 29th March 2019 at 20:40.

  13. #13
    Master
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    No hope for my sub + 6 secs per day , knocked out of the field

  14. #14
    Grand Master Saint-Just's Avatar
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    My holiday watch (yes, on holiday as of tonight, in France) has a fairly basic quartz compared to say Breitling or Omega... but it sync itself every night.
    'Against stupidity, the gods themselves struggle in vain' - Schiller.

  15. #15
    Master
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    The other option is to declare your watch out when it goes, say, 1 minute off. This might make it more realistic for the mechanicals?

    Sent from my CLT-L09 using Tapatalk

  16. #16
    Grand Master Mr Curta's Avatar
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    Mick P will win this easily, none of his watches gain or lose anything at all.

  17. #17
    Grand Master Der Amf's Avatar
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    With the mechanicals it's going to be a test of the owner just as much as the watch - which is as it should be, as an important element of a mechanical watch is its reliance on the owner.

  18. #18
    Master
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    The new Citizen 0100 is guaranteed to one second per year. Can’t see how anything will beat that.
    As for mechanicals, because they can be quite inconsistent over a long period, it could come down to luck. Interesting idea....

  19. #19
    Master
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    Quote Originally Posted by paskinner View Post
    The new Citizen 0100 is guaranteed to one second per year. Can’t see how anything will beat that.
    As for mechanicals, because they can be quite inconsistent over a long period, it could come down to luck. Interesting idea....
    Don't think anyone has one of these *yet*.

    I think 9F can come close even if they specify 5spy as all the ones I've owned were closer to 1spy.

    Sent from my EVR-L29 using Tapatalk

  20. #20
    Grand Master MartynJC (UK)'s Avatar
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    This will be quite a test for some - to keep one watch in their collection for six months

  21. #21
    Master
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    The TZ-UK British Summer Time timekeeping challenge

    Quote Originally Posted by KingKitega View Post
    Don't think anyone has one of these *yet*.

    I think 9F can come close even if they specify 5spy as all the ones I've owned were closer to 1spy.

    Sent from my EVR-L29 using Tapatalk
    This one is a 5 second model; I’ve just set it for BST.
    At about 2-0-clock there is the little adjustment knob, so the module could presumably be tweaked to near perfection?
    Presumably, one of the 9F watches has a fair chance of ‘winning’....but we’l see. On the mechanical front, I’d put my money on a well-tuned Rolex.
    Last edited by paskinner; 30th March 2019 at 17:09.

  22. #22
    Master
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    Quote Originally Posted by paskinner View Post
    At about 2-0-clock there is the little adjustment knob, so the module could presumably be tweaked to near perfection?
    Yup, as far as I know, each step of that regulation switch adjusts by 8spy for the regular 9F. Can't find info online, but presumably the same for the super special 9F you have there Peter. Has yours been keeping accurate time?

    Sent from my EVR-L29 using Tapatalk

  23. #23
    Master
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    Quote Originally Posted by KingKitega View Post
    Yup, as far as I know, each step of that regulation switch adjusts by 8spy for the regular 9F. Can't find info online, but presumably the same for the super special 9F you have there Peter. Has yours been keeping accurate time?

    Sent from my EVR-L29 using Tapatalk
    Shamefully, I must admit that I have never checked; I trust these designs, they do what they say.....as you have also experienced.

  24. #24
    Grand Master Der Amf's Avatar
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    Entry: in the sub-1k mechanical category, my Seiko Presage SPB037

    Set to time.is on my phone at 7.30am, photo to follow once I get my computer on too.

    When worn daily, its net accuracy is very good, so I've high hopes for this. Its PR is good enough that being left unworn for a day won't see it stopping, but will affect the accuracy.



    Gloomy morning -> flash photography -> horrible picture -> many apologies Here's a photo of it looking much nicer.



    The movement is a 6r15, rated +25/-15 s/d
    Last edited by Der Amf; 31st March 2019 at 08:20.

  25. #25
    Grand Master Der Amf's Avatar
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    Quote Originally Posted by Der Amf View Post
    Entry: in the sub-1k mechanical category, my Seiko Presage SPB037
    24 hours on, about -0.5s, so the hoped for good start (I'm sure that on a timegraph the results for the various positions would be all over the place)

  26. #26
    Quote Originally Posted by Der Amf View Post
    24 hours on, about -0.5s, so the hoped for good start (I'm sure that on a timegraph the results for the various positions would be all over the place)
    👍👍

    The B&R has lost 1sec...

  27. #27
    Grand Master dkpw's Avatar
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    This a great idea for a thread but I rotate mine too often to participate officially, however I am conducting my own quartz experiment.

    I have four non atomic G-Shocks and three analogue Citizens and I'm going to run them for a month or two and see how they behave. All the citizens have the same E168 movement, so variation will likely be due to temperature changes depending on time worn.

    On a side note, having only recently reacquired analogue quartz, can I say it's a pain to set precisely compared to digital, given the stepping motor and clutch not releasing the hand when pressed. There's obviously some human factors in there too.

    Good luck with everyone's experiments.
    David
    Infinite Diversity in Infinite Combinations

  28. #28
    Quote Originally Posted by dkpw View Post
    This a great idea for a thread but I rotate mine too often to participate officially, however I am conducting my own quartz experiment.

    I have four non atomic G-Shocks and three analogue Citizens and I'm going to run them for a month or two and see how they behave. All the citizens have the same E168 movement, so variation will likely be due to temperature changes depending on time worn.

    On a side note, having only recently reacquired analogue quartz, can I say it's a pain to set precisely compared to digital, given the stepping motor and clutch not releasing the hand when pressed. There's obviously some human factors in there too.

    Good luck with everyone's experiments.
    Nothing to say your challenger needs to be on the wrist - submit one of the G-Shocks :)

  29. #29

    The TZ-UK British Summer Time timekeeping challenge

    In the HAQ category, here’s my Grand Seiko SBGX009, set this morning with zero seconds offset.

    I regulated this one last week, so have high hopes

    Last edited by JGJG; 31st March 2019 at 09:18.

  30. #30

    The TZ-UK British Summer Time timekeeping challenge

    In the Quartz category, here’s my GLX 5600, set this morning with zero seconds offset.

    Not sure how this will perform; heck, not even sure I’ll still have it in October ;)

    Last edited by JGJG; 31st March 2019 at 09:19.

  31. #31

    The TZ-UK British Summer Time timekeeping challenge

    In the mechanical >£1k category, here’s my Bell & Ross 123 Geneva, set this morning with +2 seconds offset.

    Not an especially accurate watch, but I liked Der Amf’s comment about “testing the owner”, so thought I’d include this little beauty for fun. No idea whether I can keep it running for 7 months

    Last edited by JGJG; 31st March 2019 at 09:20.

  32. #32
    Grand Master Sinnlover's Avatar
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    Well a sub £1000, unserviced, 26 year old, RAF issued Seiko Gen 2 for my entry.
    I changed the battery a few months ago so it should last the summer.
    Last edited by Sinnlover; 31st March 2019 at 10:06.

  33. #33

    The TZ-UK British Summer Time timekeeping challenge

    I’ll throw the 1990 CWC G10 in for this now that I have set it again today. I’ve only had it a couple of weeks so I am interested to see how it fares.


    I think it will be near impossible for me to keep an auto running continuously but I will give that some thought today and may have a try
    Last edited by Craizeehair; 31st March 2019 at 12:20.

  34. #34
    Master
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    Okay here's my 9F contribution


    Sent from my EVR-L29 using Tapatalk

  35. #35
    Grand Master dkpw's Avatar
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    Okay I'm in with my DW-5600-HR. It contains Casio module 3229 which is rated at ±15 seconds a month, at normal temperatures.



  36. #36
    An interesting field so far... keep em coming!

    I'll pull together a table and include it in the first post above...

  37. #37
    Master sean's Avatar
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    Rolex Explorer entering the mechanicals category. 25.5 seconds slow.



    "Superlative" means of the highest quality or degree. We shall see...

  38. #38
    Master Tetlee's Avatar
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    A freshly services 70's MegaQuartz enters the fray. Will be interested to see how it does.

    anthropologist salary uk

    Pop it in the HAQ category.
    Last edited by Tetlee; 31st March 2019 at 21:17.

  39. #39
    Grand Seiko SBGA041 for the spring drive category. Currently bang on.



    Update

    Just under 48hrs later and just nudging 0.5 seconds fast (so just under +0.25spd). At the actual 48hr mark it'll likely be bang on 0.5 fast, as it usually is.

    Last edited by hughtrimble; 2nd April 2019 at 12:54.

  40. #40
    Grand Master Der Amf's Avatar
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    If I leave it for two consecutive days unworn it'll suddenly lose rather more, so I'm not getting carried away

    It's a shame no one volunteered a two hander with no minute markers - it would be interesting seeing how long it took before the inaccuracy revealed itself.

    I should have include my 1922 watch. That loses a couple of minutes a day

  41. #41
    Grand Master Sinnlover's Avatar
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    The Gen 2 is 0.3 seconds a day fast currently.
    Its 1.5 seconds fast over the past 6 days compared to Time IS.
    Last edited by Sinnlover; 7th April 2019 at 11:22.

  42. #42
    Anybody notice what I did?... I forgot to move the 7A38 to the summertime, so its been running an hour behind from my 1st shot. In the intetests of fairness, I'm NOT adjusting it. I'll leave it an hour behind so as not to be adjusting it again. So far?.... bang on the mark. 0s over the 6 day duration.

    The Offshore Pro is -19 over 6 days, sticking at a consistent -3s per day.


  43. #43
    Quote Originally Posted by JohnnyE View Post
    Anybody notice what I did?... I forgot to move the 7A38 to the summertime, so its been running an hour behind from my 1st shot. In the intetests of fairness, I'm NOT adjusting it. I'll leave it an hour behind so as not to be adjusting it again. So far?.... bang on the mark. 0s over the 6 day duration.
    Ha!

    But given the pedantry and nonsense elsewhere on the forum currently, I don’t see any reason not to re-set your watch for the hour, particularly given that you’ve reposted its current offset just now. We’re all reasonable ladies and gentlemen round these parts 🧐

  44. #44
    Master petethegeek's Avatar
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    Just over forty eight hours in and I had a quick check this afternoon. The new < 4p battery - from an assortment pack of 40 for £1.49 - was still pumping out the power, and equally surprising the timing was startlingly accurate. I had intended taking the photo on the turn of three o'clock but let it run on for a further minute in order to separate the second and minute hands. (That is two hands, not a shadow.)

    Feeling a bit more comfortable now, so I'll just leave it quietly alone for a while. I might even go and have a browse on some classic car websites...

  45. #45
    Craftsman
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    Quote Originally Posted by JohnnyE View Post
    Anybody notice what I did?... I forgot to move the 7A38 to the summertime, so its been running an hour behind from my 1st shot. In the intetests of fairness, I'm NOT adjusting it. I'll leave it an hour behind so as not to be adjusting it again. So far?.... bang on the mark. 0s over the 6 day duration.

    The Offshore Pro is -19 over 6 days, sticking at a consistent -3s per day.

    Still quite chilly weather, so I'm rooting the Offshore Pro will speed up a bit as it gets warmer.

  46. #46
    I don’t think I’ll have much chance of keeping this 2254 running for the duration but I set it yesterday and will have a good go.




    Sent from my iPhone using Tapatalk

  47. #47
    Two entries from me.

    1: (Quartz) Seiko 7A38 from 1986 with unknown service history
    2: (Mechanical >£1k) Offshore Professional from the Marine Chronometer Company. Tri-handed second hand is set using the fully black hand as the reference for this one.

    Last edited by JohnnyE; 1st April 2019 at 14:06.

  48. #48
    Craftsman
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    Quote Originally Posted by JohnnyE View Post
    Two entries from me.

    1: (Quartz) Seiko 7A38 from 1986 with unknown service history
    2: (Mechanical >£1k) Offshore Professional from the Marine Chronometer Company. Tri-handed second hand is set using the fully black hand as the reference for this one.

    The one on the left is nice, but the one on the right is really nice. I was over chatting with Darius (who built the right hand one) as he fettled the timing on my watch. He went through the full cosc spec with the final adjustment done in the crown down position. When I asked him why he said he knew that I wear my watch every day and when dangling on my wrist it'd be crown down. He also figured out I put it crown up on my bedside table (essentially so I don't have to turn head over toes when I'm half asleep) from my timing estimate verses the machine, so set the crown down as +1 sec to allow for the slightly slower running at night.

    Edit: And the good thing is that I've already forgotten which of the 3 running seconds hands he was using!
    Last edited by LorneG; 5th April 2019 at 19:46.

  49. #49
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    Another Hummer


  50. #50
    Leaderboard updated again... couple of model number missing pls :)
    Last edited by JGJG; 5th April 2019 at 22:32.

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