Thanks for the suggestions!
The back of the console consists of the 3 proprieatary connectors, 2 of them for the controllers, and one for an RF cable (The cable was proprieatary connector on one end and a standard RF connector on the other). The power goes into the console with no connector.
So this must be a standard Interton on a Grundig case.
Switching cases for marketing reasons was a common practice here in Latin America.
Since I'm not a collector and it'll be hard to repair I will not buy this console.
Thanks for all the advice!.