https://en.watch-spare.com/omega-seamaster-chrono-quartz-albatros-ref-st-396-0839.html

THIS OMEGA SEAMASTER QUARTZ 32 KHZ REFERENCE ST 396.0839 WAS LAUNCHED IN 1976 FOR THE MONTREAL OLYMPIC GAMES. ITS RECTANGULAR STEEL CASE OF 47MM BY 34MM CONTAINS THE OMAGE 1611 "ALBATROS" CALIBER WHICH IS THE FIRST HYBRID CALIBER IN THE WORLD. IT DISPLAYS THE TIME IN AN ANALOG DISPLAY FOR THE TIME FUNCTIONS AND A DIGITAL DISPLAY FOR THE CHRONOGRAPHIC FUNCTIONS. IT MEASURES UP TO 100TH OF SECOND. A HISTORICAL PIECE OF THE OMEGA BRAND THAT ILLUSTRATES THE SEARCH FOR CHRONOMETRIC PRECISION.