I picked this up at a fleamarket yesterday. It does not appear to have ever been mounted. It is a 1.5-4.5 X. The lens measures 33 mm across. Would that make it a 1.5-4.5x33? I have not been able to find anything about norinco scopes on google. I only paid $19 for it. I figured I couldn't go wrong at that price. I am wondering if this is a centerfire or rimfire scope. Any info is appreciated.