circular silver linen textured dial signed Omega Automatic Chronometer Officially Certified Constellation, black/ gilt baton indices and hands, date aperture at 3 o'clock position, matt finished case with original Omega winding crown, screw-on case back with gilt observatory medallion to centre, Calibre 564 movement no. 33062101 circa 1971, signed Omega Watch Co Swiss 24 Jewels. Case diameter 34mm by 40mm