3646 caseback classification (Type D – Type G)

by on Apr.27, 2011, under General

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

The illustration shows the following caseback versions:
Ref. 3646 / Type D Brevetee Rolex S.A.
Ref. 3646 / Type E (plain / only number)
Ref. 3646 / Type F Brevetee Rolex S.A.
Ref. 3646 / Type G (plain / only number)

You can read and see more about the different versions of Ref. 3646 watches in our book “The References” 1930’s-1940’s. Find the illustrations of  ref. 3646 / Type A – Type C casebacks here.

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