Rotary 20 ATM Diver Chronographe Vintage Review

hmmmcamu · 2024-03-30T13:38:52Z

Explore the vintage Rotary 20 ATM Diver Chronographe (circa 1969), its Landeron 149, Valjoux 7736, and Valjoux 72 movement variants, and its connection to Galeazzi Dive Equipment.

In a fascinating exploration of vintage dive chronographs, hmmmcamu unearths the intriguing history of the Rotary 20 ATM Diver Chronographe from circa 1969. This post delves into the specific case references and movement variations, highlighting the unexpected connection to a renowned dive equipment manufacturer. hmmmcamu's detailed research provides invaluable insights for collectors interested in the nuanced world of vintage tool watches and their diverse origins.

ROTARY 20 ATM DIVER CHRONOGRAPHE circa 1969

housed in Case ref# 624001 for use with Landeron cal. 149

made by Galeazzi Dive Equipement Company makers of the Armored Atmospheric Diving Suit [1938] Inventor/designer: Roberto Galeazzi Sr.

misc.

This Diver Chronographe Case also came in 2 more variants ...

1) - Outer case back with no case reference number stamped on it which was used for a Valjoux 7736 chronograph movement

2) - Outer case back stamped with reference number 3906 which was used for a Valjoux 72 chronograph movement

Key Points from the Discussion

The original author clarified that the case variants without a reference number were used for the Valjoux 7736 movement, and those stamped with reference 3906 housed the Valjoux 72 movement, expanding on the initial post's details.
This thread is discussion-light, with the original author providing the only substantive follow-up to their initial post.

The Discussion

hmmmcamu

Mar 30, 2024

case variants

for valjoux 7736 and Valjoux 72

SALMANPK

Mar 30, 2024

Has a great look and nice patina, interesting a dive company was involved in its development

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