Even into at least the early 1970s Volvo did not factory fit radios, always a dealer option. My experience post dates the 122; but, if you purchased a Volvo supplied radio from a Volvo dealer it came with Volvo printed on it. In North America I think Volvo was using radios supplied by Bendix. Check out the 7 FBVO and 6BVO Bendix part numbers. Some had both Volvo and Bendix on the faceplate. Here is an example:
https://volvoforums.com/forum/genera...23/#post410862
If you want to be period correct for Volvo in North America I think Bendix would be the product; but, they are much uglier than your Blaupunkt. I say stick with the Blaupunkt. It looks much nicer.