Mechanism: The 1570 movement superseded the 1560, but shared the vast majority of its elements, with a few notable improvements. The 1570 marked the third generation of the 1500 series. It comes with the balance assembly Rolex p/n 8106, again with a Breguet hairspring. However, it’s with a higher frequency of 19,800 bph, or 2.75Hz.

The 1570 was also equipped (starting in 1972) with a hacking feature. The 1570 became one of the most popular and highly regarded movements Rolex had so far produced. Used in the continuing series of Oyster Perpetuals, it was still powering the 5512 Submariner in 1978 and even the Explorer ref. 1016 until the end of its run in the late eighties.

Family Notes: In 1926, Hans Wilsdorf introduced the Oyster watch which used a waterproof case, hence the name. He added "Perpetual" to the name when in 1933 he introduced a reliable automatic self-winding watch. Hence the name means "Waterproof, Self-Winding" in Rolex-speak and generally means the watch is water resistant to a depth of 100 meters.