Seiko Superior x Chronograph ft. Perpetual Calendar Men Formal Round 50m Water Resistant Watch SPC253P1 SPC253 SPC-253 SPC-253P1 Luxury Seiko Superior Chronograph Watch - Features 7T86 quartz movement, sapphire crystal and 50m water resistance. Stainless steel case with premium calfskin leather strap, perpetual calendar (to 2099), 24-hour chronograph, alarm, and lumibrite illumination. Elegant 40.6mm design perfect for formal occasions. Caliber Number / Movement 7T86 (quartz) Battery Life / Accuracy Approximately 5 years (+/-15 seconds per month) Crystal Sapphire crystal Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel case with leather (calfskin) band Water Resistance 50m / 5 bar Case Size Thickness: 9.7 mm Diameter: 40.6 mm Length: 47.7 mm Lug width: 20.0 mm Other Specifications Seiko Superior x Chronograph ft. Perpetual Calendar Alarm function (daily alarm) Perpetual calendar (to year 2099) Day, date, month, leap year and 24-hour display Chronograph up to 24 hours in 1/5-second increment Equipped with small second hand Regular timekeeping (analog display)