Not multi-fuel any more than a silver tank Coleman stove today is.
That would be a squad stove (proper name, not "tanker's" stove). We still used them in the late 1970s and early 1980s in Alaska. It is the direct ancestor of the Coleman Peak 1, which has evolved into a bunch of variants (The original Peak 1 was the best thought out - I still us mine for some trips - as recently as late January this year). Coleman even replicated the aluminum carry case concept with the Peak 1 (Rectangular and thinner material, but they did toss in a functional pot gripper.)
We ran ours on Mogas - unleaded regular octane gasoline. They were more reliable on Blazo or Coleman fuel. Inattentive users could turn one into a flaming ballistic object (trailed by curses) when the generators clogged from poor fuel residues and flooded the air box.
AFAIK, despite anecdotes, they are NOT multifuel - stick to white gas (or unleaded gasoline if you insist).
Very simple to use. Easy to maintain - if you only used clean white gas, there was little to do other than oil the pump once in a while. Mogas crudded up the generator eventually. They were not completely GI-proof, but pretty close. You sure there are not instructions on the side? I bet you can Google up instructions if not.
A nifty, nostalgic, functional bit of history. Enjoy it best by using it occasionally to brew up some hot water for coffee or tea.
Edit: This was the stove we had:
http://spiritburner.com/ccs/pages/coleman536_instructions.htmBut it was carried in the aluminum can seen on this one:
http://spiritburner.com/ccs/pages/colemangi_instr.htmRegards,
Tom