Genuine U.S. Vietnam War era Delco Radio Division (G.M.C.) AN/PRT-4A Transmitter. These radio sets were first sent to Vietnam in 1967 for use in the field, due to the range performance vs the PRC-25 radios these sets were eventually used for base security, additionally these sets were also used by recon teams in 1968. The AN/PRT-4 handheld transmitter is a walkie-talkie style radio that works in conjunction with the AN/PRR-9, the transmitter is in excellent condition and features a telescopic antenna and two channel switching, comes with its original battery BA-399, also includes the paperwork for the last U.S. Army inspection done to this radio which is dated 1984. The radio transmitter was made in the 1960's and has a DA contract number on the manufacturer's plate.