With nickel-finished lever movement, 20 jewels, the matt charcoal dial with applied luminous baton and Arabic numerals, luminous hands, outer tachymetre scale, three engine-turned silvered subsidiary dials indicating constant seconds, 30 minutes and 12 hours register, in cushion-shaped water-resistant-type case with two chorongraph buttons in the band, split second mechanism operated through button in the crown, glazed display screw back, together with an 18k white gold Panerai concealed double deployant clasp, case, dial and movement signed