Carrera ref. 3648 T
The goldplated Carreras are always a bargain as they are not in demand as the stainless steal ones. This is a early one with first execution dial and hands. There's no black stripe on the hands or the hour markers on the dial.
The movement is Valjoux 92 signed Heuer-Leonidas.
If you look for a vintage Carrera on a bugdet, the goldplated ones are the one for you. They are still possible to find for a steal...