Oyster Perpetual 1501 — Black Dial

Rolex 1575

Date caliberCaliberThe designation of a watch movement, identifying its design or movement family. with an instantly jumping calendar and no quickset, shared with the GMT-Master, Datejust and early Sea-Dweller. Hacking secondsStop-secondsA time-setting function that stops the running seconds when the crown is pulled, commonly by arresting the balance in a mechanical watch. It allows synchronisation with a reference time signal. Also called hacking seconds; stopping does not itself return the hand to zero. added in 1971 (HODINKEE’s Submariner guide and Bob’s 1680 guide give 1972). The rotorRotorAn oscillating weight that uses wrist movement to wind an automatic watch’s mainspring. bridge is marked 1570.

Automatic · Introduced 1965 · 19,800 vph · 48 h reserve