Thanks... I think it's safe to assume it's public domain. Defense mapping agency first ed 1920. 6th ed was printed month and year I was born.
BTW: I tucked em all away in my MoBo directory for safe keeping...
http://www.xl-logic.com/mobo/
I don't trust things to stay on imageshack for too long. Feel free to link to em in my directory if you want. They're in the "backgrounds" folder. I might include em with version 2.0 as default background options.