The first diver's watch that influenced the design of subsequent generations.Seiko’s First Diver’s
In 1965, Japan's first automatic mechanical watch with water resistance to 150 meters was born. To withstand high water pressure, a double packing structure was adopted for the crown, and its performance was so highly rated that it was worn by the 8th Japanese Antarctic Research Expedition in 1966. The simple conical case and thin rotating bezel give a smart impression. The case back bears a dolphin mark, indicating its water resistance. The dial is all black, and the indexes are square and coated with luminescent paint. The 11 indexes are not embedded, but embossed to prevent them from peeling off even if subjected to harsh shock. The technology and design used for this first diver's watch steadily evolved, leading to the development of a diver’s watches with even higher specifications.