Alpinist Black Series Limited Edition Seiko PROSPEX introduces an authentic premium sport watch, merging the influential heritage of the 1965 SEIKO diver's watch with a highly professional night-vision concept. This stainless steel 200m diver's watch adopts Seiko's 'Green Lumibrite Pro' that was developed to meet the high diving standards of ultimate and longer-lasting brightness underwater. The original model was released in 1965 as the first made-in-Japan divers watch. It had a water resistance of 150m, exceeding the standards of other brands and successfully proved its reliability by accompanying numerous adventures including those of the Antarctic Research Expedition. (not a diving watch) This watch adopts the famous case design of the ""turtle origin"" introduced in 2022 and its design expresses the view seen through a night scope and the all-black exterior mirrors a 'night vision' view of the world. Equipped with Cal. 6R35, this watch is exclusive to diver's watches manufactured in the Shizukuishi Watch Studio and the stainless steel, super hard coating makes it suitable for diver's depths of 200m.