AN/GRC-109 Transmitter/Receiver
1961 - 1969
This set was developed in the  post WWII period and was initially used by the CIA as the RS-1 (1950-1964).  The GRC-109 was produced from approximately 1961 - 1969).  Used  from Special Forces units until the mid 1970s.  An interesting accessory for this set is the GRA-71 which allowed Morse code burst transmissions to be made at speeds of about 300 WPM.