Yes, the Brabham-Kadett was launched in 1966. The puzzle car is supposed to be from 1967.
It would be interesting to know how many Brabham Kadetts were sold in Germany. Because Opel launched the Rallye-Kadett at the same time.
For comparison: 60 Opel-hp against 70 to 75 Brabham-hp. 7.175,- DM for the Rallye-Kadett against at least 7.690,- DM for the Brabham, if only the engine tuning is ordered. With chassis optimisation and modified equipment, about 13,000 DM should also have been possible... And we are only talking about the coupé here, not the convertible version.