Seiko Prospex x Automatic ft. Alpinist aka 145th Anniversary aka Edo Purple (Limited Edition of 7,000 Pieces) Men Formal Round 200m Water Resistant Watch HBC006J1 HBC006 HBC-006 HBC-006J1 Discover the Seiko Prospex HBC006, a 145th Anniversary Limited Edition where Japanese heritage meets adventurous Alpinist design. Its rich Edo Purple dial, classic cathedral hands and compass inner ring create distinctive character, framed by super-hard-coated stainless steel and sapphire crystal. Powered by automatic caliber 6R55, it offers a 72-hour reserve and 200m water resistance. Caliber Number / Movement 6R55 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 72 hours (+25 to -15 seconds per day) Crystal Sapphire crystal with magnifier (anti-reflective coating) Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel (super hard coating) case with leather (calfskin) band (three-fold clasp with push-button release) Water Resistance 200m / 20 bar Case Size Thickness: 12.7 mm Diameter: 39.5 mm Length: 46.4 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Alpinist aka 145th Anniversary aka Edo Purple (Limited Edition of 7,000 Pieces) Made in Japan LIMITED EDITION on the case back Magnetic resistance (4,800 A/m) Rotating compass inner ring See-through case back Screw-down crown Screw case back 24 jewels Date display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)