Missing second hand?

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These Zenith models are identical to the UG ref 2048. Not sure what the cal is
 
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It seems to me that I can see the pinion for the missing sweep hand. I will post the photo for you.
P1170416-scaled.jpg
 
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Thanks for you help with the reference. I also think that the sweep second hand is missing. Most watches during this period show the seconds, it would be highly unusual. But this watch looks also nice without that missing hand.
 
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Nice, so also a two hander. Do you have a full scope of the catalogue page? I'm very interested to see the other dial configurations of the next references, looking as other diso volantes. So hard to find original pictures of that special case design in catalogues. So I have never seen one in a Longines catalogue from 1937 -1939. My experience is that they were released no longer than two years from 1938 until 1939.
So found this in a thread in UG forums
https://omegaforums.net/threads/universal-disco-volante-ufo-a-rarity.85494/#post-
1254220https://omegaforums.net/threads/universal-disco-volante-ufo-a-rarity.85494/#post-1254220

x779242-33306a68b52a4ee3ac4c83edf1fe961f.jpg.pagespeed.ic.qDqtYgK6Tz.webp
Edited:
 
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Great, could you please share this catalogue page to see the other references. I'm very interested to see the disco volante cases/dials.
 
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Great, could you please share this catalogue page to see the other references. I'm very interested to see the disco volante cases/dials.

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