Seiko Superior x Automatic ft. Emergency Signal (Limited Edition of 500 Pieces) Men Formal Round 100m Water Resistant Watch SSA113J1 SSA113 SSA-113 SSA-113J1 Own the exclusive Seiko Superior Limited Edition watch, with only 500 pieces made. This formal men's timepiece features a unique bidirectional compass bezel with ground-to-air emergency signal codes. Powered by the 4R37 automatic movement with 41-hour power reserve, hacking seconds, and exhibition case back. A highly collectible, functional tool watch made in Japan. Caliber Number / Movement 4R37 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 41 hours (+45 to -35 seconds per day) Crystal Hardlex crystal Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel case with stainless steel band (three-fold clasp with secure lock, push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 13.3 mm Diameter: 45.0 mm Length: 50.0 mm Lug width: 22.0 mm Other Specifications Seiko Superior x Automatic ft. Emergency Signal (Limited Edition of 500 Pieces) Made in Japan LIMITED EDITION on the case back Serial number engraved on the case back Bidirectional rotating compass bezel Ground to air emergency signal code See-through case back Screw case back 24 jewels Date and 24-hour display Stop second hand function (hacking mechanism) Regular timekeeping (analog display) Enhanced Features and Functions Compass function (rough indication of directions based on position of sun) Emergency evacuation signal codes (9 distress signs sent from ground to aircraft)