The Rolex Cal. 618 without Incabloc: “Type 1”

by on Aug.10, 2010, under General

Used in Ref. 3646 watches from Type A to Type G, the Rolex Cal. 618 movement comes without Incabloc shock protection. Typical for the non-incabloc version is the serif font for the letters A-R (French) and F-S (English) engraved on the regulation device (later versions show “+/-” symbols – see also Type 4).

The central bridge shows the “ROLEX 17 RUBIS” engraving on the left side. This engraving is used only in Ref. 3646 watches from Type A to Type D, as the Ref. 3646 watches from Type E to Type G bear “17 RUBIS FAB. SUISSE”.

You can read and see more about the different versions of Rolex Cal. 618 movements in Panerai watches in our 2nd book “Vintage Panerai – The References”.

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