Ref 16660 | ‘Triple Six’ (1978-1989) This is considered by many to be the start of the “modern” Sea-Dwellers, mainly because it now features the sapphire crystal. br But more than this, it improved several crucial features: a bigger case, a larger helium valve, all of which led to an increased water resistance of 4,000 feet or 1,220 meters – twice than the previous models. |