So heres my two cents...
that fan being meant to run on 120v has the two wires that 120v usually uses, the black and the white, but I am going to guess it is rather old,and is lacking a Ground wire.
Theoretically you could splice a normal 16-18 guage extention cord and just simply hook it right to the wall.
But to be honest, because i don't see a Ground wire, I wouldnt use it.