With nickel-finished lever movement, black matte dial with engraved Bayadére stripes, applied Arabic and baton numerals, luminescent hands, aperture for date at 6 o'clock, two sudsidiary dials indicating constant seconds and 30 minute register, large cushion water-resistant-type case with screw-set lugs, the back secured by four screws, case, dial and movement signed, with a stainless steel Chaumet double deployant clasp