Seiko Caliber 4R34 automatic movement (works with movement without battery). � MonaWatch +1 GMT feature to display two different times simultaneously. chrono18.com Water resistant. Scratch-resistant Hardlex glass. Stainless steel case with a comfortable and elegant Jubilee bracelet. Watch diameter 42.5 mm, giving a strong presence on the wrist. Seiko Boutique Lumibrite illumination for hands and indices in the dark. The watch looks beautiful on the wrist and is eye-catching. Material: Stainless Steel Brand: Seiko Movement Type: Automatic Watch Size: 42mm Features: Water Resistant