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| Re: Day Night hands [message #822 is a reply to message #813] |
Fri, 28 June 2013 00:53   |
C. Hurt
Messages: 243
Registered: May 2013
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Gruen Guildsman |
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Jenneke wrote on Thu, 27 June 2013 16:16How does that jumping mechanism from day to night work?
This watch was made using both the 522CA and 510CA movements. It's a pretty simple adaptation of the standard calendar mechanism, modified so that the calendar is tripped at 12 hour intervals instead of 24. The standard date ring is replaced with one showing 12 alternating bands of black and 12 of luminous green. When the mechanism trips at the 12th hour, the ring advances one notch. On a standard calendar, this gives you the next day in the single cutout window. In this modification, with 12 cutouts in the dial, the disc advances showing one color through all the cutouts. 12 hours later, it advances again, so the other color shows through.
If that isn't clear, I'll try to get pictures of a parts movement.
[Updated on: Fri, 28 June 2013 00:55] Report message to a moderator |
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| Re: Day Night hands [message #833 is a reply to message #822] |
Fri, 28 June 2013 15:51 |
Habitant
Messages: 19
Registered: June 2013
Location: United Kingdom
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Gruen Apprentice |
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Thanks, all. As to the Day Night dial I sent in, it seems to me that there was a later version with a calibrated chapter ring, such as the one I sent in. The link C Hurt sent is to a model that I believe to predate mine; but I await further information from those who know more about the sequence of events. Most of the Day Nights I've found are like C Hurt's, but there are a fair few around like mine (teardrop window cut-outs versus rectangular, etc), which suggests, but doesn't in any way prove, that there existed two variant models, just as there are around 4 variations on the AIrflight dial.
BTW, a quite nice looking Airflight has just popped up on the Bay: http://www.ebay.co.uk/itm/281128084262?_trksid=p5197.c0.m619 - the later configuration with the revolving bezel ring, etc. But no purple to be seen...
[Updated on: Sat, 29 June 2013 08:27] Report message to a moderator |
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| Re: Day Night hands [message #909 is a reply to message #906] |
Tue, 02 July 2013 13:40 |
C. Hurt
Messages: 243
Registered: May 2013
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Gruen Guildsman |
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Seeing better photos, I believe this one to be all correct. I think it's a later watch that was cased in a conservative stainless case at the factory. Any markings inside the caseback?.
[Updated on: Tue, 02 July 2013 13:41] Report message to a moderator |
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| Re: Day Night hands [message #913 is a reply to message #910] |
Tue, 02 July 2013 18:42 |
C. Hurt
Messages: 243
Registered: May 2013
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Gruen Guildsman |
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Made in France is typical for these mid to late 1960s models. It refers just to the case, not the entire watch. I think that seals it that this is a correct all original example. Good score.
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