I only ever bought one Zippo. It was back in '69. One side has a caricature of an OH-6A. The other says "Eyes of an Eagle, Heart of a Lion, Balls of a Scout". Haven't sparked it in near 40 years but the flint is fresh. Back then they were brass with a brushed nickel finish.
Out pig shootin' awhile back and found one in the sand. Aluminum case anodized puke green with a bass on the side. Looked kinda gay if you ask me. I doubt Gen. Patton would have approved.
BD