Quote:
Originally Posted by jlovda
I seem to have had strange luck on buying "old" watches. I purchased my 5513 new at Chronometrie Beyer in Zürich in the summer of 1970. The SN is 204xxxx which puts the mfg year as 1966 ???
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204xxxx should have a 1968 caseback. Based on my experience with the sales of complete sets back during the 1960s and well into the 1970s, most watches were sold two to three years after the case back stampings.
A 204xxxx serial number would more than likely be found on a watch sold during 1974/75.
Personally, I prefer to date the 1972 and earlier watches by their case back dates - it is much more consistent for me than any of these charts found on the internet.