Yes; well spotted. I believe that many BC items are re-badged from OEMs. I suspect Dale in the case of the "10 mA" testers you mention. But their range overall is more or less complete, and their catalogue is very good.
I assume that the Gossen Metrawatt is the SA-2500. The manual for that one does indeed mention 62353 (and VDE 0751-1), as it does the "Alternative Measurement Method". As well as a 200 mA PE test current.
Meanwhile,
here is a handy source of BC User Manuals.
