Omega, a gentleman's gilt and steel electonic Constellation Chronometer Megasonic 720 calendar wristwatch, 1970's,

Omega, a gentleman's gilt and steel electonic Constellation Chronometer Megasonic 720 calendar wristwatch, 1970's,
circular silvered dial signed Omega Constellation Chronometer Megasonic 720Hz, baton markers, day/date aperture, sweep centre seconds, electronic movement, large rectangular gilt case with chamfered corners, milled bezel, steel screw back, 40mm x 37mm.