Hello,
I have omega, Omega Constellation Marine Chronometer

Caliber: 1510
Number of movement: 0000XXXX
Number of cases: 0000XXXX
(non-identical numbers)
Not recorded in Besançon Observatoire.

Did you see number 0000?
Did you see Caliber 1510 in Marine Chronometre?

Thank you

 

That's an odd one for sure !
1. Never seen an OMC with a 4 digit number on the back, that's only been 1510s and after looking it up, 196.0013 is a 1510 case back, not an OMC case back
2. The engraving on the plaque does not look like the standard Omega engraving, could be a later custom job. I have seen parts with blank plaques

So it's either a rare prototype (unlikely) or a pieced together watch (more likely)...where does it come from ? Have you contacted the Omega museum about it ?

 

Hello,
Thank you for your reply.
I bought this watch more than 10 years ago in a watch exchange market in Villette (Switzerland)
The number immediately attracted my attention, thats why i bought it.
I will contact Musée Omega.