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Thread: The 2020 British Summer Time Challenge

  1. #251
    Master
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    Hardly worn over the last couple weeks, so now back ahead of reference time.


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  2. #252
    Master
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    Quote Originally Posted by LondonNeil View Post
    ... for fun so I reset the date and corrected the time....stopped by 10 minutes before I picked it up..
    huh? Are these watches aren’t still in the competition. Maybe I’m being thick?
    Last edited by MartynJC (UK); 14th May 2020 at 22:01.

  3. #253
    Grand Master Der Amf's Avatar
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    At the end of the 5th week, I noticed that I had needed to rest the watch crown up overnight exactly once a week. On average, the watch has spend six days losing each second, and one day catching it back up.

    So I've just rested it crown up for ten nights in a row, and it is exactly ten seconds fast:



    The idea is that from now to the end of Week 15 (Sun 12 July) I can leave it to do what it wants, and by then it should have lost those 10 seconds and be back to +0. We'll see!

  4. #254
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    6 week update for the BLNR. Worn everyday and stored crown up over night. It has gained 1'28'' over 42 days giving an improved daily average of 2.10 seconds.

  5. #255
    Still bang on the mark for the 2007 Aerospace. Worn on the wrist most days.


  6. #256
    Craftsman Murdoc's Avatar
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    After 49 days the Snowflake has gained 17s (started 67s slow, now 50s slow).


  7. #257
    Now +17 seconds for the Casio

  8. #258
    Master
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    First update for 12 days. BB58 still spot on, however the Seiko 5 has now drifted 23 seconds slow.

  9. #259
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    7 week update for the Timex. It's now running at +4 seconds.

  10. #260
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    PAM312 now at -95s so -9s over the last 8 days which is slightly better than its long term average of -2spd.




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  11. #261
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    FOIS still at +8s having just been round and not worn since last measured, seems to be spot on if left alone dial up but gains several spd if worn.


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  12. #262
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  13. #263
    Master
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    I just know my Patek is going to be way off absolute value - it’s gaining +3.x s/d - it doesn’t seem to vary if it’s worn or not. Perhaps second order variance is more the key to chronometer status? I’ll get a picture up at the weekend.

  14. #264
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    Quote Originally Posted by MartynJC (UK) View Post
    I just know my Patek is going to be way off absolute value - it’s gaining +3.x s/d - it doesn’t seem to vary if it’s worn or not. Perhaps second order variance is more the key to chronometer status? I’ll get a picture up at the weekend.
    Are you saying that the more expensive watches are likely to be less susceptible to positional variance?

  15. #265
    Master
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    Quote Originally Posted by beechcustom View Post
    Are you saying that the more expensive watches are likely to be less susceptible to positional variance?
    yes. However, I guess I should be happy with +3s/d - if I wanted more I’d wear my Casio.

  16. #266
    Grand Master
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    Quote Originally Posted by beechcustom View Post
    Are you saying that the more expensive watches are likely to be less susceptible to positional variance?
    Correct, the better quality movements exhibit lower positional variation.

  17. #267
    Quote Originally Posted by walkerwek1958 View Post
    Correct, the better quality movements exhibit lower positional variation.
    Isn't that because they've been adjusted to multiple positions (5 or 6 seems to be the standard fare)?

  18. #268
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    Quote Originally Posted by MartynJC (UK) View Post
    yes. However, I guess I should be happy with +3s/d - if I wanted more I’d wear my Casio.
    Quote Originally Posted by walkerwek1958 View Post
    Correct, the better quality movements exhibit lower positional variation.
    Cheers guys. Any idea if quartz movements are affected by positional variance?

  19. #269
    Master
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    Quote Originally Posted by beechcustom View Post
    Cheers guys. Any idea if quartz movements are affected by positional variance?
    Can't edit my post so am quoting it. What I mean is, does resting a quartz watch in different positions when off wrist affect it's timekeeping at all?

  20. #270
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    Some interesting results


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  21. #271
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    Quote Originally Posted by beechcustom View Post
    Cheers guys. Any idea if quartz movements are affected by positional variance?
    I very much doubt it, considering typical quartz (watch) crystals oscillate at 32KHz - and electronics controlled - I can’t see how they would be affected. The gear train is a different principle to mechanical watches.

    I stand to be corrected of course.

    Martyn

  22. #272
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    Quote Originally Posted by MartynJC (UK) View Post
    I very much doubt it, considering typical quartz (watch) crystals oscillate at 32KHz - and electronics controlled - I can’t see how they would be affected. The gear train is a different principle to mechanical watches.

    I stand to be corrected of course.

    Martyn
    Many thanks. I've been experimenting with my Q Timex resting it in different positions but it's difficult to tell if there is any impact on the timekeeping as the gain is so small anyway, the 9F Grand Seiko even more so. I suspect you are correct.

  23. #273
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    7 week update for the BLNR. It has gained 1'41" over the last 49 days giving a slightly improved average of +2.06 seconds per day. It seems to perform better when on wrist and stored dial up. One day I didn't wear it and it gained 3 seconds over 24 hours.

  24. #274
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    Quote Originally Posted by AlphaEchoAlpha View Post
    Currently at -12 seconds, so around -1/2 second a day... Not bad.

    Well I just noticed this was sat on my bedside table stopped so I'm out. Been busy in the garage last few days so hardly been wearing a watch at all. Drat!

  25. #275
    Master
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    8 week update for the Grand Seiko 9F. Still bang on after 56 days.

  26. #276
    Grand Master Der Amf's Avatar
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    Having given it 10 seconds to lose over the next 60 days, the OCG has decided to stop losing any. So here it is, 10 seconds fast at the end of Week 8 of 30



    (Actually, it lost a second over 6 days, and then gained it back when left alone for 24 hours and the PR had a chance to run down a little)

    (Reading posts like this must as boring as listening to other people's dreams, huh?)
    Last edited by Der Amf; 24th May 2020 at 20:56.

  27. #277
    Craftsman Murdoc's Avatar
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    56 days in and the Snowflake has gained a total of 20s (started 67s slow, now 47s slow).


  28. #278
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    Perhaps 0.25 of a second fast. Wonderful stuff.

  29. #279
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    PAM312 now -101s




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  30. #280
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    FOIS has a gained a couple to +10s




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  31. #281
    Grand Master Saint-Just's Avatar
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    +5s
    'Against stupidity, the gods themselves struggle in vain' - Schiller.

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