Drive system: Mechanical Caliber: F8N64 ・Average daily error: +15 seconds to -5 seconds (static accuracy) ・Working time: more than 60 hours ・Case material: Stainless steel (SUS316L) Glass material (front): Double-sided sapphire crystal mirror (SAR coating) ・Glass material (back): Sapphire crystal Luminous: No ・Strap material: Stainless steel (SUS316L) Belt width: 20mm Arm circumference: 140mm-200mm ・Clasp: Push-type three-fold clasp (Included strap: Genuine crocodile leather, push-type three-fold strap) (Included strap: Arm circumference length: 150mm-190mm) Weight: 156g Vertical diameter: 47.3mm ・Horizontal diameter: 40.0mm Thickness: 12.9 mm ・Water resistance: Enhanced water resistance for daily use (100M) ・Magnetic resistance: 1 type Other functions: Automatic (manual winding), power reserve indicator, stop seconds, see-through case back, 22 jewels, date, replacement strap included (click here for information on replacement straps) Release date: June 2025