Rolex Caliber 1600

Brand	Rolex
Caliber Number	1600
Movement Type	Manual wind
In-House?	Yes
Lignes	9.25”’
Diameter	20.8mm
Height	2.32mm
Jewels	17 / 19
Power Reserve	~48 hrs
Vibrations Per Hour	19,800 bph
Anti-Shock Device	KIF
Features	Central hours, central minutes
Country of Manufacture	Switzerland

The Rolex caliber 1600 is a 17 jewels manual wind watch movement, originally released in 1964. This movement is a 2-hander with hours and minutes only.

Text on the train wheel bridge:

Montres Rolex S.A. / Geneva / Swiss / Seventeen 17 Jewels / 1600

Other text:

Unadjusted / ROW

Rolex 1600 VS 1601:

The 1600 was upgraded to have 19 or 20 jewels in the caliber 1601. The diameter and height are the same. The winding pinion, clutch wheel, and the stem are interchangeable. Currently known as the 1602 (slightly thicker with a faster beat rate) and found in manual wind Cellini models.