The very straight neck leads me to believe repro if I remember what Steve has said in may of his posts regarding these flasks. Hopefully someone more knowledgable will know for sure...
...and worthy of a little more info like what's embossed on it, what's the back, bottom and top look like.
"???" tells me nothing more than I want to know the rest. It could be a very worthwhile piece regardless.
I have a similar flask that I picked up at a yard sale a couple years ago for a couple bucks. I did some research but did not find anything like it. It does not have any "Wheaton" or "Clevenger" markings. I always thought it was just some type of reproduction. Still a neat looking bottle.