Cal. 2326/2840 nickel-finished lever movement blue textured dial applied Arabic numerals luminescent hands magnified date aperture three subsidiary dials for 30 minute and 12 hour registers constant seconds outer ring for tachometer tonneau water-resistant-type case octagonal screw-set bezel screw down crown back secured by eight screws case dial and movement signed heavy 18k white gold Audemars Piguet Royal Oak Offshore bracelet and double deployant clasp