Seiko 5 Sports Field collection have been created with an 'in the field' military design - taking inspiration from a style originally called a 'trench watch,' created to be robust and reliable - echoing the Seiko 5 Sports characteristics. Seiko 5 Sports is known for over fifty years of reliability, durability, performance and value. The "5" represents the original five key features of every Seiko 5 still present today: Automatic movement, Day-date display, Water Resistance, Recessed crown and Durable case and strap. Seiko 5 Sports Gents Automatic Watch with Blue Dial and Black Leather Strap SRPG39K1 has movement: 4R36 Calibre Automatic movement with manual winding option completed with 24 jewels. Up to 41 hours power reserve. Lumibrite on hands and indexes. A blue dial Seiko Men's watch. Curved Hardlex crystal lens. 100m water resistant watch.