Seiko Prospex x Automatic ft. Alpinist aka GMT aka Watchmaking 110th Anniversary (Limited Edition of 3,000 Pieces) Men Formal Round 200m Water Resistant Watch SPB409J1 SPB409 SPB-409 SPB-409J1 Explore new heights with the Seiko Prospex Alpinist GMT SPB409 Limited Edition, featuring a dual-time function for global travelers. This 39.5mm stainless steel watch houses the 6R54 movement (72h power reserve) with 200m water resistance, sapphire crystal, and a compass-inspired silver dial. A professional-grade tool watch blending mountaineering heritage with modern GMT functionality. Caliber Number / Movement 6R54 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 72 hours (+25 to -15 seconds per day) Crystal Sapphire crystal (curved, anti-reflective coating) Luminous LumiBrite on hands and indexes Case / Band Material Stainless steel (super hard coating) case with stainless steel band (three-fold clasp with push-button release) Water Resistance 200m / 20 bar Case Size Thickness: 13.6 mm Diameter: 39.5 mm Length: 46.4 mm Lug width: 20.0 mm Other Specifications Seiko Prospex x Automatic ft. Alpinist aka GMT aka Watchmaking 110th Anniversary (Limited Edition of 3,000 Pieces) Made in Japan Additional leather (calfskin) band inclusive 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 and 24-hour (GMT dual time) display Stop second hand function (hacking mechanism) Regular timekeeping (analog display)