The beautiful Omega Constellation Chronometer F300hz from 1972 is a nice example of the transition era between mechanical and electric watches with what is probably the most interesting electric movement: The Tuning Fork.
It has been fully serviced in April 2018 by Paul at electric-watches.co.uk. It included: full service, new Omega crystal, new metal date wheel, new hour wheel, new index wheel. The movement Omega 1250, based on the ESA 9162 is now running perfectly.
The case is in an excellent original condition with sharp edges, likely never polished, and crisp observatory logo on the case back.
The gold dial with applied indexes is very hard to show on pictures. It plays very well with the sunlight and takes many different shades of gold depending on the orientation of the light. The date wheel is originally in plastic and the teeth breaks with time. It has been replaced with a metal one made for this movement.
The original hands have some patina.
It comes with a perfectly color matching NATO strap.
The case measures 36mm without crown, 43mm lug to lug, 10mm thick with a 20mm lug width.
The watch is located in, and shipped from, Geneva, Switzerland. Shipping is done through priority mail (Swiss Post) with tracking number. Importation fees are the buyer's responsibility.
The water resistance is not tested. I advice not to wear a vintage watch around water even if it was originally waterproof. I describe the watch as it is now.