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
