Rolex 1601 Datejust non-quick set 14k/SS circa 1978 Estate

Rolex 1601/1570 Datejust non-quick set
14k/SS circa 1978 Estate
Oyster perpetual
Automattic

Specifications
Brand: Rolex
Caliber reference: 1570
Movement: Automatic, self-winding. Bi-directional rotor.
In-house developed and manufactured
Height: 5.75mm thickness
Diameter: 28.5mm (12.5 inch)
Jewels: 26
Frequency: 19,800 VPH (BPM)
Hacking seconds
COSC certified
Models using this caliber: Rolex Date 1500, Datejust, Explorer, Submariner
Country of manufacture: Switzerland
Functions: Hours, minutes, central seconds (date)
Hairspring: Free-sprung Breguet