The Black Series 2022 Limited Editions inspired by night diving. The black case expresses the darkness and silence of the night ocean, and the orange color is inspired by the lights that illuminate it. This watch is a reinterpretation of Japan's first diving watch, launched in 1965. The watch proved its reliability when worn in the harsh environment of Antarctica in the 1960s. The new creation is true to its design heritage, but is updated to today's Prospex standards.