I guess I'm lucky to be in ancient swords, people haven't started faking them (yet) but they do place them way off in dating because nobody does the research except a few die-hards. Different story though.
Now back when I collected later (17-18-19 century) stuff, I remember having this conversation with a bunch of guys and I have to say I think you're right Arel. The more tipoffs you give the more you help out the forgers. You said right up front in your first post about the letters being off for Imperial Russia--
"And then you read the inscription on the blade: the grammar is post 1918 ( absent letters "yat") and the spelling is wrong." I think that's enough to convince anybody, right there.
Tim