Eric:
Your second attached thumbnail is of an RT-246/VRC Receiver-Transmitter.
This is, as indicated on the nameplate, part of the AN/VRC-12 family of field tactical radios.
The RT-246 is the same size as the RT-524 and fits into the MT-1029 Tray, Mounting.
The RT-246 has an automatic turning system which is controlled by front panel push buttons, where the RT-524 does not. The RT-524 has a loudspeaker, the RT-246 does not.
The RT-246 was typically used in the AN/VRC-43, -44, -45 Radio Set configurations.
AFAIK, Canada did not use the RT-246.
Reference: ARMY TM 11-5820-401-12, Aug 1972.
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PRONTO SENDS
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