I´ll guess you are right. Talking to an old friend today who was working in the company selling the Hellborg bass, he said that in Sweden they only sold the Hellborg model in black.
The amp factory was in fact ( i belive) the same that made FBT. And since Hagstrom had been the REP for FBT in Sweden a few years earlier... none of the amps came out on the market in Sweden, as my friend could recall.
In the earlier thread about this, i think someone quoted Wikipedia on this subject!
Cheers!