Hi Bill,
Indeed, the problem is my bad english ...

I didn't want to say, that camera we are calling FAG is not FAG at all. But initially FAG name was intended for another camera, according to the early source above. The project of "Pionier" was given for production at Zavod Geodezia. We can accept this information, while VOOMP Pionier and FAG are almost identical with only few minor changes as you have described recently.
But back to the mentioned source again, the project was given to Zavod Geodezia to continue the production of cameras, under initial name "Pionier"! Beside this, VOOMP have created a conceptionally new camera to be produced at Zavod Geodezia since 1936, under name "FAG" ...
My question is - where is prototypes, drawings and other technical documention of mentioned new camera? I understand, that project was failed unfortunately and Geodezia Pioniers have got the FAG name, but some archives of conceptional camera should survive until now ...
Best Regards,
Aidas