This is slightly off subject, since BRNO is neither German nor Austrian (although it was once located in the Austro-Hungarian Empire), but I wonder if anyone could enlighten me about the model designation 21 and 22 for post-War BRNO sporting rifles.
I have always thought that the BRNO 21 was a version without integral scope bases and the BRNO 22 designated a model with the integral bases, but I have never seen this in print, and I somtimes see rifles advertised as 21's with the integral bases and vice versa.
I have owned examples of both, and as far as I could determine there was no model designation marked anywhere on either.
