Cal. OP III nickel-finished lever movement 21 jewels Glucydur balance the black matte dial with luminous Arabic and baton numerals luminous hands subsidiary seconds magnified aperture for date in distinctive cushion-shaped water-resistant-type case with sloping bezel and downturned lugs trademark crown protecting bridge with lever lock screw back together with a stainless steel Panerai deployant clasp case dial and movement signed.