The bootleggers have changed the game a little. Used to tell the fake ones buy the serial numbers. Now the numbers look legit but they have a copper colored ring instead of gold. The box's look the same as a real one as well. Even the glass is pretty good but they are bogus. A guy I know had two on his table this week-end. He was selling them as bootleg Leupolds but for a guy that didn't know any better he would get hoodwinked.