Case: 18K yellow gold Back cover: 18K yellow gold and sapphire glass Back cover specification: See-through screw-back Glass material: Box-shaped sapphire Coating: Anti-reflective coating on inner surface Case size: Width 37.0mm, length 44.3mm, thickness 11.4mm Band width: 20mm Band material: Crocodile leather Clasp: One-push three-fold method Caliber No.: 9RB2 Drive method: Spring Drive automatic (with manual winding) Drive duration: Approximately 72 hours (about 3 days) when fully wound Accuracy: ±20 seconds per year (equivalent to ±3 seconds per month) Water resistance: Enhanced daily-use waterproofing (10 bar) Magnetic resistance: Yes Other: "LIMITED EDITION" marking on case back Serial number engraved on case back 18K yellow gold clasp Number of jewels: 34 jewels Power reserve indicator function