Omega Constellation Electroquartz f8192Hz wristwatch, asymmetric stainless steel case with blue dial, centre seconds date at 6, sapphire crystal, left hand side crown on a 13 jewel cal. 1300 quartz movement no. 31734591 (Omega Beta 21) to a leather band. Case 43.5 x 35 mm long, 14.7 mm wide, 11.5 mm thick. C 1970.