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Originally designed in 1971 for the admittedly niche market of cave explorers, the Rolex Explorer II was later updated to fit the aesthetic codes of the brand's other sports watch families. Reference 16550 is one of only three Explorer II variants since the first one, and also one of the rarest. It was in production for just one and a half or two years starting in 1985, and offered an improved, simpler look, new dial colours, GMT functionality and the first sapphire crystal in an Explorer. This Rolex Explorer II 16550 has a Black dial and a Bracelet strap. This Rolex has undergone a thorough inspection of water resistance, accuracy, functionality and condition to determine the level of reconditioning required to meet our strict standards. It has also been referenced against technical documents and manufacturer records where available to ensure authenticity and a clean history. All our watches have a 24-month warranty for your peace of mind. One of our skilled polishing technicians has removed marks on the case and bracelet of this watch, brought about by daily wear and tear, which is why this watch does not come with the remaining manufacturer’s warranty. Verified details include bracelet or strap of Steel (length 18 cm), case material of Steel, case size of 40 MM, dial of Black, movement of Automatic and original box of Yes. Available colours: Black and Available sizes: 40 MM.