TW924Special Edition Yamaha Factory Racing Movement OS25 (chrono) from Miyota OS25 movement is accurate up to 1 20th of a second Made of high grade 316L steel Diameter of the case 45 mm Black carbon dial PVD yellow gold plated pillars on the side of the case Reinforced mineral crystal with a sapphire layer Screwed crown 10 ATM water resistant Blue silicon strap with double injection logo, anti dust protection layer and steel clasp All straps have a special
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