18-jewel Cal. 1861 movement numbered 77137018 matt black dial with luminous hourly batons and subsidiary recorder dials for minute and hour recording and running seconds at three six and nine oclock respectively polished tonneau shaped case with black calibrated tachymetre bezel twin start/stop and reset pushers flank crown on three oclock case side fitted makers black leather strap with folding steel deployment clasp case dial and movement signed together with Omega box and papers 42mm.