Hi all - I'm hoping you are able to help me fill in details about a vintage Vacheron Constantin watch. It appears to be a ladies model, 18k yellow gold case, manual wind, approx 21mm in diameter. The serial number (506xxx) dates it from 1950-1955, but there are several other numbers inside the caseback as well as on the movement that don't make sense. The paperwork indicates the following:
- Watch number 506xxx
- Movement number 660866
- Model 15012
- Stamped by the dealer "July 1978".
The caseback includes the watch number on the outside and inside, as well as 7149 below the watch number.