White Accented Square Shaped Skeleton Automatic Movement in a mono sapphire crystal case. Clear Silicon Strap and see through back with 3 ATM water resistant. Model 3201-004 Case size: 44 mm Skeleton Dial Thickness: 11.3 mm Crystal type: Sapphire Movement: Automatic Movement Bracelet Type: Silicone Water Resistance: 3 ATM Features: Luminous Power Reserve