2024.05release Exterior Exterior: 18K pink gold Case back: 18K pink gold and sapphire glass Back lid specifications: See-through screw back Glass material: box-shaped sapphire Coating: Internal anti-reflective coating Case size: Width 36.5mm Height 42.7mm Thickness 11.7mm Band width: 18mm Band material: crocodile Movement Movement: 9S64 Instructions Drive system: Mechanical hand-wound Driving period: Lasts approximately 72 hours (approximately 3 days) at maximum winding Static accuracy: average daily difference +5 seconds to -3 seconds Accuracy is based on Grand Seiko's own standards when measuring the movement as a single unit before shipment from the factory under conditions of 6 position differences and 3 temperature differences. Accuracy under the environment in which the customer will actually use the product (mobile accuracy) differs. Also, due to the characteristics of mechanical models, the accuracy range described above may be exceeded depending on the conditions of use (time of use, temperature, arm movements, strong shocks or vibrations). Mobile accuracy: +10~-1 seconds per day Functions Waterproofing: Reinforced waterproofing for daily life (10 ATM) Antimagnetic: Yes Weight: 80g others: Beautiful lock 18K pink gold Number of stones: 24 stones