This watch is powered by the Valjoux 72 movement, marked UG Cal 130 and made in house in the 1960s.
The Valjoux 72 — arguably the finest manual-wind chronograph ever — ranked highly among historical movements, and reach extraordinary auction prices.
The famous and million dollar Rolex Daytona Paul Newman also used the Valjoux 72. Approx 750,000 movements are said to have been produced by various companies.