Reply With QuoteMy word, never seen the like of that before! :shock:
Looks in fabulous condition too.
R
Hi All,
Continuing with my posts of the more 'unusual' watches in my collection - I thought you might be interested in seeing another one of my Longines Chronographs.
It has the very rare 'Vernier' extension on the second hand allowing timings to a 10th of a second.
I'ts amazing that the extra weight on the second hand seems to have had no effect on performance - the watch runs perfectly even though I suspect it was manufactured in the mid seventies.
My word, never seen the like of that before! :shock:
Looks in fabulous condition too.
R
Ignorance breeds Fear. Fear breeds Hatred. Hatred breeds Ignorance. Break the chain.
That's a great looking watch and the perfect candidate for a re-issue.
That is fantastic and I love that seconds hand. 8)
May I ask where you came across it?
Another interesting and unusual watch :thumbup:
I may be wrong, and perhaps long-standing members will correct me, but I think your ten first posts are the most interesting ten first posts ever posted!
Another lovely piece I haven't seen before.
Keep up the good work. :)
Cheers,
Neil.
Impressive piece, too tired to guess how it works.....
Could it be that the extra weight smooths out the (presumably) 1/5 sec steps of the seconds hand, to actually give about a 1/10 sec resolution?Originally Posted by noiseboyuk
From RAF training (vernier calipers) in the 1950's, I did know how it works.
[really geeky thought . . ]
On the Wikipedia vernier scale page, there's link to an earlier method called "transversal" which would be far more suitable for a sweep seconds hand. Picture a dial with 60 radial lines going from the center out to the seconds markers and the seconds hand having 10 divisions marked along it's length!!
Thanks, Ted, now I understand.... :)
Creative use of the vernier scale indeed. Is it a high-beat movement (36000 bpm), which would make it accurate to 1/10s like say the El Primero would be?
If it were 36,000 bph, would it not say "Ultra-Chron" on the dial? Not sure that they made a chronographic Cal. 43x, did they?
http://montresuisses.blogspot.com/20...and-4-pos.html
Smart, somewhat more unique than a "boring" sub-dial. Obvious concerns about whether or not the movement is accurate though.
+1 :bounce:
john
THIN is the new BLACK
That's what I would have thought... but then if it's 28.8kbph or 21.6kbph then would the chronograph hand then be accurate to less than 1/10s? I suppose the Vernier scale does still mean it will be accurate to the nearest 1/10s.If it were 36,000 bph, would it not say "Ultra-Chron" on the dial? Not sure that they made a chronographic Cal. 43x, did they?
http://montresuisses.blogspot.com/20...and-4-pos.html
I'd guess that you'd be fairly lucky in any case to be able to get 1/10s accuracy when pushing the stop button in any case. I really like the feature though - not sure if I could live with the scale sitting on the end of the second hand in reality - certainly a talking point.That's what I would have thought... but then if it's 28.8kbph or 21.6kbph then would the chronograph hand then be accurate to less than 1/10s? I suppose the Vernier scale does still mean it will be accurate to the nearest 1/10s.
When discussing this topic, we should be careful in our terminology:That's what I would have thought... but then if it's 28.8kbph or 21.6kbph then would the chronograph hand then be accurate to less than 1/10s? I suppose the Vernier scale does still mean it will be accurate to the nearest 1/10s.
The steps that a seconds hand makes as it goes around the dial are indicative of it's resolution, which is a separate subject to that of it's accuracy. That is to say - an 18,000 bph watch, for example, can not "resolve time" to smaller than 1/5 second intervals. So, even though the vernier scale used can by itself resolve to 1/10 sec, it's unlikely that the seconds hand will come to rest at anything but a sub-multiple of the bph - ie 1/5 sec for 18,000, 1/6 sec for 21,600 or 1/8 sec for 28,800.
Having said all that, it's quite difficult for a watchmaker to align a seconds hand exactly with the marks when assembling it onto it's post, so there's another variable for ya!!
Pedant. ;) You're right of course, but you clearly understand what I'm saying. It is still a funky feature.When discussing this topic, we should be careful in our terminology:That's what I would have thought... but then if it's 28.8kbph or 21.6kbph then would the chronograph hand then be accurate to less than 1/10s? I suppose the Vernier scale does still mean it will be accurate to the nearest 1/10s.
The steps that a seconds hand makes as it goes around the dial are indicative of it's resolution, which is a separate subject to that of it's accuracy. That is to say - an 18,000 bph watch, for example, can not "resolve time" to smaller than 1/5 second intervals. So, even though the vernier scale used can by itself resolve to 1/10 sec, it's unlikely that the seconds hand will come to rest at anything but a sub-multiple of the bph - ie 1/5 sec for 18,000, 1/6 sec for 21,600 or 1/8 sec for 28,800.
Having said all that, it's quite difficult for a watchmaker to align a seconds hand exactly with the marks when assembling it onto it's post, so there's another variable for ya!!
Interesting watch. Do you know which movement it uses?
Best wishes,
Bob
It has been a while since I've seen something 'new' in the watch scene. The fellow that dreamed up that one is no dozzer!
Sure, and yes it's certainly funky :D
IMO all the horologically interesting watches were made in the past.
Nowadays most makers are content to all use the same boring movements in ever larger cases for huge amounts of money. :?
Cheers,
Neil.
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