Omega Speedmaster Professional Quartz Ref. 186.0004 from 1977

Omega Speedmaster Professional Quartz ref. 186.0004 in very good condition and completely untouched condition from 1977. The unpolished case has is showing only minor signs of wear. The dial and the display are without any flaws. The original crystal is showing some light scratches but an original replacement crystal will come with watch.The original steel bracelet (ref. 1305.741) has sufficient length and is in very good condition too. The service history is unknown, but my watchmaker has just checked the movement (cal. 1620), replaced the batteries and it is working perfectly well in all functions.