A Pink Gold Automatic Sweep Seconds Wristwatch, Omega, Constellation, Circa 1960

18k, copper lever movement, 24 jewels, glucydur balance, micrometer regulator, adjusted to temperature and 5 positions, pink gilt 'pie pan' dial, applied lapidated triangular indexes, dauphine hands, sweep seconds, circular case with downturned lugs, engraved observatory logo to the screw back, case, dial and movement signed.