This came out of my M37. It was mounted in the cargo box, just infront of the left wheel well. I think it might me something radio related, but don't know. Number stamped on it is FT-107. The plate is aluminum and the pins are stainless. Looks like something clipped over the pins. Any info would be appreciated.
Those are the same pins that would hold something that was canvas onto a vehicle. Military aircraft use those pins to hold First Aid kits in place. I wonder if it was some sort of document pouch for the M-42 command truck??
Green Mountain Military Vehicle Club Army Transportation Association Vietnam
BC-191Transmitter, AM/CW, HF controlled by plugin tuning units (TU-x). Output 50 Watts. Requires 1100, 425, and 12-14 VDC. Uses BC-193, BC-194 or BC-204 antenna tuner and BC-196 antenna relay and BC-192 Control Box. Part of SCR-177, SCR-187, SCR-188, SCR-193. Schematic http://www.fernblatt.net/m7.html#a1225
BC-312(*) Receiver, 1.5-18mHz, Vehicular, used in tanks. IF 470KHz. 9 tubes. Picture (courtesy Richard Post) Schematic http://www.fernblatt.net/m7.html#a1243