Oh my stars! Hi there and welcome to the forum. I can not believe no one else has been here to greet you yet. Welcome! Welcome! WELCOME!!! (and...
)
There are a lot of people on here who can help you out. I have been a collector myself for more than (Gasp!) 40 years. However, odd as this sounds, i do NOT know what FMV stands for. (At least, at this hour, I can't think of it... Ha!) (Full monetary value, perhaps?)
ROCKY HORROR is a great poster to start off with---for an incredible film to boot. It was standard for posters to be machine folded up until about the mid-80s. For a while after you had some folded and some rolled. Now they are pretty much all rolled. An unfolded ROCKY HORROR would be very scarce as it would have to have been pulled from the printing press before it moved onto the folding machine. That practice was not unheard of---but it is a RARE thing for pre-mid-80s posters.
Just by looking at the image you supplied, it seems to have the right markings...but it also seems to be MISSING other markings. My copy is tucked away in a box somewhere at the moment, (I'm moving to Washington state in October.) so i can't compare them. I can not be sure. There is a something called a GAU symbol that should be there, but isn't. Also something indicating which style it is should also be in the lower margin. But again...I am not sure. I can't compare it to mine. There is no ratings box, so that would indicate this was an international release poster...but those missing elements SHOULD be there still anyway.
I hate to tell you this---and please, ask others. Don't just take my opinion.---but I THINK that you have a commercially produced reproduction, the kind they'd sell (rolled) at record stores or whatever.
Whether that is the case or not---WELCOME to the forum. (Oh... I'm sorry. i probably ruined your first foray into the world of posters. i'm so very sorry...)
It is a paper poster, correct? It's not backed at all? What are its dimensions? There are people