Rolex 300

Rolex 300 is a manual winding form movement by Rolex.

Features: 18,000 A/h, 15 jewels, small seconds, power reserve 50 hours.

Identical: Gruen 877 (Alpina Gruen Guild).

Built by Aegler and used in the "Doctor's Watch", Rolex used the Calibre 877 with slight modifications for the model Prince from 1932. The Prince was the first wristwatch produced in large numbers that received a chronometer certificate.

Manufacturer: Aegler (Rolex) Description: Manual winding movement Escapement: Stone lever Yoke winding system Bimetallic screwed balance Breguet hairspring Patented crown mechanism Functions: Small seconds Data: 7½ x 14½ lignes D 16.9 x 32.71 mm, H 4.1 mm 15 jewels 18,000 A/h Power reserve 50h Production period: 1928-1937