You folks who suggested it was a firefighter's tool were right. I scrubbed the
rust off this thing and found a very faint patent number. From 1924,
Combination Firefighting Tool, James Hooben. One end is a cold chisel for
unspecified prying, the square socket has a slight taper and was designed to
fit multiple square nut/bolt sizes, and the curved section is for hoses as
mentioned.

Thanks for the help.

GTO(John)