This is a WW II (early) Hallicrafter motion picture. It shows the Hallicrafter plant and manufacturing of the HT-4 (early version of the BC-610) and the installation into the SCR-299, mobile communications unit. http://www.archive.org/details/VoiceofV1944_2 part 2 http://www.archive.org/details/VoiceofV1944 part 1