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Patek Philippe

Caliber number

 

The M is stamped in front of the number because there is a (second) Geneva seal behind it. It means that it was originally meant to be a regular 27-460. That's why the serial number was changed. I found a picture of another reworked version (same ref.) with S/N 1121983. My guess is that it was done by PP.

3445 is a nice watch but this one is definitely overpolished.

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