Thanks to the thunderous lack of response from this newsgroup, I have
moved my rare STR-5 "strip receiver" to the big auction site.

A real cold war relic, the STR-5 was made in TMC's Ottawa plant, serial
number 4.

It has a door on the front, where you plug in a module that sets the
frequency of the radio. The module has a crystal oven, and room for two
sets of crystals (the second channel requires an optional second
receiver IF board which was not installed on this radio). I imagine
they had a rack nearby, keeping these modules in hot-standby
temperature mode, and would swap them out with the peacetime modules
should the need arise.

BTW, it is Technical MateriEL Corporation (spelling). They adopted the
British spelling of Material.