It's most likely an Air Force surplus tow rig for 1950's era big planes- - - -C-97's, B-47's, C-124's, etc. both ends would have had the same pin and ring type hitch for aircraft tow bars that attached to the nose landing gear. I wouldn't be surprised to find steerable axles on both ends, also. I saw several similar rigs during my UASF time, 1967-75., but I don't recall one with a double stovebolt cab. Moving (and stopping) big planes takes a very heavy tow vehicle. Coleman made a lot of those kinds of pieces of equipment, along with other aircraft-associated specialty rigs.
Jerry
