Orient Star x Automatic ft. M45 F7 Semi Skeleton aka Moon Phase Men Formal Round 100m Water Resistant Watch RE-BT0006L Discover the Orient Star Classic M45 Mechanical Moon Phase, powered by the in-house automatic Caliber F7M42 with a 50-hour power reserve. Housed in a 41mm stainless steel SUS316L case with a dual-curved sapphire crystal featuring super anti-reflective coating. The semi-skeleton dial reveals the 22-jewel movement, complemented by a moon phase complication, date display, and power reserve indicator. Completed with a stainless steel bracelet and an additional cordovan strap. Water-resistant to 50 meters. Caliber Number / Movement F7M42 (automatic with manual winding capacity) Power Reserve / Accuracy Approximately 50 hours (+15 to -5 seconds per day) Crystal Sapphire crystal (dual-curved, super anti-reflective coating) Luminous Nil Case / Band Material Stainless steel case with stainless steel band (three-fold clasp with push-button release) Water Resistance 100m / 10 bar Case Size Thickness: 13.8 mm Diameter: 41.0 mm Length: 49.0 mm Lug width: 20.0 mm Other Specifications Orient Star x Automatic ft. M45 F7 Semi Skeleton aka Moon Phase Made in Japan Additional leather (cordovan) band inclusive (deployment clasp with push-button release) Magnetic resistance (4,800 A/m) See-through case back Screw case back 24 jewels Date display Moon phase display Power reserve indicator Stop second hand function (hacking mechanism) Regular timekeeping (analog display)