Product parameter

Model:1987S
Movement: SH16
Drive: Single spring
Winding method: Automatic winding 
Power reserve:50 (hours) 
Vibration frequency:21600 (times/hour) 
Case diameter:43-49.5mm
Case thickness:14mm
Strap width:20-25.5mm
Crystal material: Sapphire
Case Material: Stainless Steel
Strap material: Rubber
Water resistance:50 meters 
Crown: Straight in