Avant-garde Skeleton RK-AV0A03B Movement: Mechanical ・Caliber: F6F44 ・Average daily difference: +25 seconds to -15 seconds (static accuracy) ・Power reserve: Over 50 hours ・Case material: Stainless steel ・Glass material (front): Sapphire crystal (AR coating) ・Glass material (back): Inorganic glass ・Luminous light: - ・Band material: Leather ・Band color: Black ・Band width: Approx. 21mm ・Wrist circumference: Approx. 150mm-190mm ・Clasp: Push three-fold ・Weight: 109g ・Vertical diameter: Approx. 49.2mm ・Horizontal diameter: Approx. 42.6mm ・Thickness: Approx. 13.0mm ・Water resistance: Reinforced daily waterproof (10 ATM)