Rolex 1556

The Rolex 1556 was the fourth-generation Day/Date movement from Rolex.

Introduced in 1965, Cal. 1556 added faster 19,800 A/h beat rate to the Day/Date complication. It is an automatic movement and a certified chronometer. Hacking seconds were added in 1972.

Manufacturer: Rolex Description: Self-winding movement, bi-directional winding Chronometer certificate Functions: Central seconds Hacking seconds Day/Date Data: D 28.5 mm 26 jewels 19,800 A/h Production period: 1965-1977 Predecessor: Rolex 1555 Successor: Rolex 3055