halgedahl
1333
Mike, we can always "count" on you. Many thanks for this cut&paste which has taught me (us?) quite a lot about the amazing usefulness of the chronograph! Now to
Jul 09, 2019,07:32 AM
practice! (Just like a musician, eh?) But really... I wonder if NASA trained the astronauts in these many practical uses of the Speedmasters they wore, lo these 50 years ago. I seriously doubt it! I aim to write to Lange to see if someone will reveal (or if there is already an article that does) the mechanics behind the actually instantaneous jumping minute hand. I also thought to correspond with Richard Habring, as I doubt anyone knows more about the chronograph than he. (And my brief correspondence with them has always been quite pleasant.) If you don't mind, I'd like to send a copy of the above as a reference point. Many thanks for taking the time to help out—not a surprise when it comes to you. Best wishes, Fred
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For the consideration of chronograph caliber enthusiasts...
By: halgedahl : July 8th, 2019-06:36
Good day chronograph enthusiasts! Though some may argue that a rotating bezel is a far simpler solution to most daily time-keeping requirements (parking meter, 3-minute egg, et al), we who are devoted to this significant advance in horology will always ar...
Something to consider
By: jmpTT : July 8th, 2019-07:26
Never mind the minutes. I’ve often thought that the hours register could jump as well. So why not? The reality for most mechanical chronographs is the jump of the minutes register is semi-instantaneous, not instantaneous. The irreversible jump is engaged ...
Well, I did...results surprised me
By: jmpTT : July 19th, 2019-15:02
Stopped two watches between 59 and 60s. Lemania 2320 - minute hand on register stops fractionally between 0 and 1 min. Glashutte Cal 61 - minute hand completes jump to 1 min, once sequence starts. For what it’s worth, it seems that different semi-instanta...
We are clever guys, let's think this through
By: cazalea : July 8th, 2019-23:39
There’s a 7750 Chrono system shown here (in the midst of an IWC watch) The crown is at 3 and the minute counter below 12; hours above 6. Ignoring all the start / stop functions, here is its driving system. As Art noted, revolving gear 8447 with a spring a...
Grazi, Fred! . . .
By: Dr No : July 10th, 2019-11:30
. . . breathlessly waiting his reply . . .