This timeless automatic mens watch from Seiko features a 39 x 13mm brushed stainless steel case with see-through back. The black dial has luminous number hour markers and hands and a day/date display window. Finished with a 20mm beige nylon strap and 100m water resistant. The self-winding mechanism means there is no battery to replace. Paying tribute to the original Seiko ‘Trench’ watch, this timepiece channels vintage military heritage with a modern edge. It features a rugged black dial with bold luminescent hands for maximum legibility in all conditions. A beige NATO strap adds a classic field-ready touch, offering comfort and durability. Inside, an automatic movement powers the watch with precision—visible through the see-through case back that reveals the mechanical craftsmanship within. Powered by the calibre 4R36 automatic movement with a power reserve of up to 41 hours. Presented on a nylon NATO strap with pin buckle. Hardlex crystal. 39.38mm case width. 100 metre water resistance. Seiko 5 Sports Field collection These watches have been created with an 'in the field’ military design – taking inspiration from a style originally called a ‘trench watch,’