Unified 8 Factory newly added masterpiece, ultra-thin 90g counterweight version, two-pin semi-business model Rolex Perpetual 1908, size 39mm9.8mm, exclusive custom-modified Chronergy escapement system, blue Syloxi balance spring Cal.7140 self-winding movement K The gold stamped folding buckle more closely restores the feel and wearing texture of a K gold watch, rolex