Seiko Presage x Automatic ft. Japanese Garden aka Semi-Skeleton Men Formal Round Water Resistant Watch HCB007J1 HCB007 HCB-007 HCB-007J1 Seiko Presage Semi-Skeleton, a vintage-inspired mechanical watch with a 41.8mm stainless steel case and a black leather strap. Powered by the in-house automatic Caliber 4R71 with a 41-hour power reserve. The dual-curved sapphire crystal and see-through screw case back offer a clear view of the 24-jewel movement. Water-resistant for daily wear. Caliber Number / Movement 4R71 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Sapphire crystal (dual-curved) Luminous Nil Case / Band Material Stainless steel case with leather (calfskin) band (three-fold clasp with push-button release) Water Resistance Water resistant Case Size Thickness: 12.0 mm Diameter: 41.8 mm Length: 48.3 mm Lug width: 20.0 mm Other Specifications Seiko Presage x Automatic ft. Japanese Garden aka Semi-Skeleton Made in Japan See-through case back Screw case back 24 jewels Stop second hand function (hacking mechanism) Regular timekeeping (analog display)