Hand made , probably in the Theater of Operations.
Crudely fashioned of brass, and probably from fired artillery shell. Two lower sections of brass were soldered in place and drilled holes allowed for mounting on a vehicle. The insignia measures 8×11 overall.
The 6th Artillery, Battery “D” was part of the 37th Infantry Division in WW2.
The brass shows hammering marks from its construction, and a nice untouched period patina.
My reason for believing it to be WW2 is the group of material it came with; none of which was related.
USPS Priority $8.00