The Seiko Prospex SPB189J1 is a men's automatic diver's watch, part of the "Alpinist" series. It showcases a 39.5mm stainless steel case with a sapphire crystal and a cyclops lens over the date. The green dial is complemented by gold-tone hands and indices, all coated with Lumibrite for improved legibility. Powered by the 6R35 automatic movement, it provides a power reserve of approximately 70 hours. The watch is water-resistant up to 200 meters and includes a stainless steel bracelet with a three-fold clasp with push-button release.