3646 caseback classification (Type A – Type C)

by on Sep.08, 2010, under General

An example of our classification work: The reference 3646 is divided into seven production groups (Type A – Type G), of which the different caseback markings and numbers (inside) are just one of the most important indicators.

The illustration shows the following caseback versions:
Ref. 3646 / Type A Oyster Watch Co (large)
Ref. 3646 / Type B Oyster Watch Co (small)
Ref. 3646 / Type C Brevetee Rolex S.A.

You can read and see more about the different versions of Ref. 3646 watches in our 2nd book ““The References” 1930’s-1940’s.

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