Rolex 4160
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Cal. 4160 (and the similar Cal. 4161) is an automatic Regatta countdown calibre by Rolex.
Overview
Self-winding chronograph movement, rotor bi-directional winding, 28,800 A/h, 42 jewels, Kif shock protection, power reserve 72 hours. Cal. 4160 contains a programmable timer with functions set using the special "Ring Command" bezel on the watch.
The movement was specifically developed on basis of the calibre 4130 for the model Rolex Yacht-Master II.
The similar Cal. 4161 was introduced in 2013 with the stainless steel Yacht-Master II Ref. 116680.
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