Sold at Auction: Vintage Omega Constellation Electronic F300Hz Chronometer Wrist Watch. Quartz movement. Serial number 3421749, circa 1972. Stainless steel case with no band. 37mm case with silver dial and luminous markers.
Omega Constellation Chronometer Electronic f300 Hz, Photos 1 sur Gmtbroker
La Cote des Montres : Enchères Omega "Constellation" Chronometer, Electronic F300 Hz. Produced circa 1970. Very fine and rare center-seconds, water-resistant, stainless steel gentleman's electronic wristwatch with date and a stainless steel
Omega] Constellation f300Hz from ~1972 : r/Watches
Omega Constellation Chronometer Electronic Stainless Steel... for $660 for sale from a Trusted Seller on Chrono24