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)