18ct gold Omega 'Constellation' chronometer Electronic f300Hz gentleman's watch, 1970's

12 jewels, with tuning fork quartz movement, two-tone champagne dial with gold and black enamel baton markers, applied gold logo on red enamel on the 12 index, black and gold luminous hands, date aperture, the tonneau case with milled bezel, the movement stamped 1987264, movement licenced Bulova Pat., case, dial and movement signed, diameter approximately 37mm, with 18ct gold articulated bracelet, with twin folding clasp