Help with this 1960s constellation

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Hello !
I would like to ask you for help to identify this watch:


I think it’s either a 14777 or 14393, but I am not sure (btw: what’s the difference between them?). any comments welcome.
The dial looks original…

thanks & regards
 
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I think it’s either a 14777 or 14393, but I am not sure (btw: what’s the difference between them?).

About 3mm in diameter, 34 vs 37.
 
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MtV MtV
About 3mm in diameter, 34 vs 37.

Yes, I knew the 14777 is the big one, but wondered if there is a thing on the dial that would make it easier to spot one
 
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Larger ones typically have a small marker to the right of the date window. Looks like a 14393, which is a far more common reference. Crown is incorrect, but otherwise looks fine.