Panerai caliber OP XXXI
OP XXXI description
Automatic mechanical, exclusive Panerai OP XXXI calibre, 13¼ lignes, 25 jewels. Glucydur® balance, 28,800 alternations/hour. Incabloc® anti-shock device. 178 components. Power reserve 50 hours. It is tested and certified by C.O.S.C.