Product Description
Inner length: 220mm
Strap width: 20mm-26mm
Case diameter: 49.5mmx43mm
Movement diameter: 17.2mmx5.9mm 
Case thickness: 14mm
Inner ring of long strap: 160mm~-220mm
Short strap inner ring: 145mm-200mm
Movement-core: 7H50 Automatic Movement
Case material: 316L stainless steel
Vibration frequency: 28800 (times/hour)
Strap material: Rubber
Drive: Single-spring drive
Waterproof depth: 50M life waterproof
Power reserve: 80 (hours)
Mirror back cover: Artificial sapphire
Winding method: Automatic winding

Model 1981 Feature:
80 Hours Power
High Quality Polishing Case
Super Luminous