Here is the one I have. Very similar and mine has the tag. It says:
Corps of Engineers
U.S. ARMY
EXTINGUISHER, FIRE, WATER
DEMOUNTABLE, NESTABLE
PUMP TYPE 4 GAL. CAPACITY
SNL 58-427********
Manufactured by HOFSTRAND


Hope that helps.
Mike

Fire Extinuisher 001.jpg Fire Extinuisher 002.jpg