The Ref. 6152/1 Panerai with crown protecting device and “Marina Militare” dial is the 22nd watch in our book “Vintage Panerai - The References” (chapter IV.III), published in 2009.

Features of the watch:
Reference: 6152/1
Dial: “Marina Militare” (sandwich, engraved)
Case number: 124532
Movement: Rolex Cal. 618 / Type 3
[photo by Maurits Bollen]

The Ref. 6152/1 Panerai with 8 mm Rolex crown is the 18th watch in our book “Vintage Panerai - The References” (chapter IV.I), published in 2009.

Features of the watch:
Reference: 6152/1
Dial: “Luminor Panerai” (sandwich, engraved)
Case number: 124822
Movement: Rolex Cal. 618 / Type 3

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”.