41mm Hand Wind Blue Dial Mens Watch Case Size: 41 mm, Thickness: 10.52 mm, Material: 18kt white gold. Strap: Blue leather strap. Bezel: Fixed solid 18kt white gold bezel. Crystal: Sapphire crystal is scratch resistant and transparent with a see through case back. Functions include hour, minute, second, date display at the 6 o'clock position, power reserve indicator, day display. Movement Type: Hand wind mechanical Calibre 31-505. Luminescent hands and markers for low-light visibility.