Seiko Prospex Speedtimer SPB515J1Seiko Prospex Speedtimer SPB515J1. Specifications Movement Caliber Number 6R55 Movement Type Automatic with manual winding Precision +25 to 15 seconds per day Power reserve Approx. 72 hours(3 days) Jewels 24 Functions Stop second hand function Case Band Case Material Stainless steel (super hard coating) Case Size Thickness: 12. 0mm Diameter: 39. 5mm Lug to lug: 44. 5mm Crystal Curved sapphire crystal Crystal Coating Anti reflective coating on inner
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