|Movement Type||Manual wind|
|Jewels||17 / 19|
|Power Reserve||~48 hrs|
|Vibrations Per Hour||19,800 bph|
|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
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.