The Rolex Cal. 618 movement – engine of the 3646

by on Jun.24, 2014, under Allgemein

Used in Ref. 3646 watches from Type A to Type G, the Rolex Cal. 618 / Type 1 movement comes without Incabloc shock protection.

Typical for this non-incabloc version is the serif font for the letters A-R (french) and F-S (english) engraved on the regulation device. The screwed off caseback next to the case shows the decorations on the inner caseback (completely decorated). More Information about the different finishings on inner casebacks of 3646 watches can befound in our book “History1″ (page 166-167) and in our book “History2″ (page 546-547).

See also a comparing between the Rolex Cal. 618 / Type 1 and the Rolex Cal. 618 / Type 4 movement).

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