Is the lighter a Zippo? If so, you can go to the Zippo-Case website for dating codes and other info that may help you. And there are many collector's groups for limited edition / special edition / military Zippos, where you might find some help.
I'll search some more later as time allows but, like, you, I'm not having any luck with this so far. I'm not even convinced that's a plane. It also looks like an inverted leaf / frond.
