A GOLD CHRONOGRAPH WRISTWATCH WITH REGISTER AND TACHOMETER, OMEGA, 'DE VILLE', CIRCA 1970

18k, gilt lever movement, 17 jewels, mono-metallic compensation balance, silvered matte dial, applied baton numerals, two subsidiary dials indicating constant seconds and 30 minute register, outer ring calibrated for tachometer, circular case, case, dial and movement signed.