unknown tee wrench

[jimwrench]

Heres a tee wrench of unknown origin that followed me home yesterday. No markings. 7 1/2 by 11 in size. 7/8 and 11/16 square socket and 1 1/8 hex socket. Good heavy wrench socket walls are 3/16 to 1/4 thick. I've leafed thru all three volumes of Rathbone and don't find it. Anyone have a clue to its origin ? 

[gibsontool]

That's cool. It looks a lot heavier than most of the T's that you usually see.