BGS net on a BGS helmet?, that's not wrong.
I get your point though, there is a lot of "that looks ok so it'll do"
It always has been that way and even now if you go to any of the big shows, there will be German re-enactors using Swiss and Swedish uniforms, there'll be yank re-enactors wearing lots of Dutch and French made things, there's even good old Bulldog British tommies who wear Canadian and Indian made equipment, and a lot of it is post war made.
94-87 Ich bedauere nichts
57-93 Either put me in jail or kill me