With nickel-finished jewelled lever movement, the engine-turned black dial with applied Arabic and baton numerals, luminous hands, windows for date at 12, three engine-turned subsidiary dials indicating constant seconds, 30 minutes and 12 hours register, in circular case with two chronograph buttons in the ribbed band, downturned lugs, glazed display back secured by six screws, together with a stainless steel Corum concealed double deployant clasp, case, dial and movement signed