Oil on paper, ready to hang.
Signed on the back.
I have maybe a dozen of these vintage Australian military survey maps of various parts of Australia coming up. They're all the same size, so if you're looking to create a feature wall, you might find these suitable. Sprayed with light coat of varnish for protection. Thin edge canvas. I've wrapped the map around the edges so that it's visible if you chose not to pop it into a frame.