Seiko Presage x Automatic ft. Cocktail Time aka Black Russian Men Formal Round 50m Water Resistant Watch SRPF39J1 SRPF39 SRPF-39 SRPF-39J1 Discover the Seiko Presage Cocktail Time Black Russian SRPF39J1 - featuring a sophisticated dark dial inspired by the classic cocktail. Powered by 4R35 automatic movement (41h power reserve) with exhibition case back and curved hardlex crystal. The 38.5mm stainless steel case with slide clasp bracelet blends refined elegance with Japanese craftsmanship. Caliber Number / Movement 4R35 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal (curved) Luminous Nil Case / Band Material Stainless steel case with stainless steel band (slide clasp) Water Resistance 50m / 5 bar Case Size Thickness: 11.8 mm Diameter: 38.5 mm Length: 45.4 mm Lug width: 20.0 mm Other Specifications Seiko Presage x Automatic ft. Cocktail Time aka Black Russian Made in Japan See-through case back Screw case back 23 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)