This rubber stamp kit was issued by the U.S. military and was used for food inspection and veterinary practices. The kit is dated 12/1979 and has the serial number 0036 on each stamp. It was manufactured by Action Marking of River Grove, Illinois.
The kit contains two, 2 x 2-in. rubber stamps complete with identification symbols, interchangeable rubber numerals, an ink pad, and secured ink vial.
In spite of its diminutive size, the kit weighs in excess of one kilogram. From its construction, it appears to have been designed to withstand a lot of abuse while used in the field.