I used to have a few Zippos, I don't know where any are, except one. I carried it with me every day for many years. I got quite beat up but never failed to light. I got it 1972 when I was in the Navy. It says "US Naval Station Roosevelt Roads, PR." Like I said, it's beat up, but about a year ago, I cleaned it up, filled it, put in a new flint & that baby lit like a new Zippo.
Actually, I have another identical one that I had bought for my Dad that looks like new. Gotta love Zippos, they just work.