Item Number PR1044-87Y Caliber No. 6628 power Mechanical (self-winding + manual winding) accuracy -20 to +40 seconds/day duration Approximately 40 hours (at maximum winding) weight 70g Thickness 9.9mm case size Width 28.5mm case material stainless Case surface treatment Partially plated (pink gold color) Band material/type Stainless steel tri-fold push type Bandwidth 14.0mm band adjustable size 130～180mm glass Spherical sapphire glass Waterproof performance 5 ATM water resistant Design features White pearl dial Dial: 1 point crystal Crown : Glass ceramics (blue color) Luminous (hands) function Frequency of vibration: 28,800 times/hour Number of stones: 21 stones 2024.02.release