Exterior: Stainless steel case (partly 18K yellow gold) Bezel: Ceramic Back lid: Sapphire glass Glass material: Dual curve sapphire Coating: Anti-reflective coating on the inside Case size: Width 43.8mm x Thickness 16.1mm Arm circumference (longest): 201mm Nakadome: One-push three-fold method Movement Movement: 9R86 operating instructions Drive system : Spring drive Drive time: Maximum winding time lasts about 72 hours (about 3 days) accuracy : Average monthly difference ± 15 seconds (equivalent to daily difference ± 1 second) function waterproof : Enhanced water resistance for daily life (10 bar) Magnetic resistance: can be weight : 190.0 g others : ・ See-through back ・ 18K yellow gold crown, button ・ 24 hour hand (dual time display function) ・ Nakadome part 18K yellow gold ・ Screw lock type crown ・ Stopwatch function (30 minutes total, 12 hours total) ・ 50 stones ・ Second hand stop function ・ Power reserve display function ・ With the back lid lion coat of arms ・ Screw back (There are individual differences in the orientation of the back lid due to manufacturing reasons) ・ Calendar-linked time difference correction function 202110release