The Rolex Cal. 618 with Incabloc: “Type 3″

by on Aug.27, 2010, under General

Used in the minority of Ref. 6152/1 watches, the Rolex Cal. 618 / Type 3 movement comes with 15 jewels and the Incabloc shock protection. It was another development to improve the quality of the movements, after earlier Ref. 6152 watches held 15 jewel movements without the Incabloc feature. The escapement bridge is similar like on Rolex Cal. 618 / Type 2 movements, typical for movements powered with 15 jewels.

Compared to the Rolex Cal. 618 / Type 4 movement, which is used in most of the 6152/1 watches, the engravings on the movement bridges show clear differences. The “ROLEX” and “FAB. SUISSE” engravings changed their positions. The “SWISS MADE” engraving and the engravings of the jewels used (“15 RUBIS” on Type 3 / “17 RUBIS” on Type 4) changed positions as well.

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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