18ct YG Deville - manual wind ?

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Hello OF

I am currently considering an 18 ct yellow gold deville, originally i thought it was a quartz, but it turns out to be a manual wind, according to the seller.

He does not know the calibre of the movement or the reference number of the case.
Would anyone happen to know either piece of information ?
Just trying to evaluate the asking price with comparatives as well as compare the dial to any others that are close.

Thanks all !
 
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Probably a caliber 620 or 625.
 
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Bear in mind that this is likely somewhere around 31-32mm.