With nickel-finished lever movement glucydur balance silvered matte dial with applied Arabic and luminescent disc numerals luminescent hands aperture for date at 6 oclock three subsidiary dials indicating constant seconds 30 minute and 12 hour registers large tonneau water-resistant-type case with domed crystal and rotating black bezel calibrated for 60 minutes with luminescent diving indicator the back secured by six screws screw-down crown case dial and movement signed with stainless steel Corum double deployant clasp