That is an excellent high-quality video. Thanks!
The JAN nomenclature of the KWM-2A is RT-718/FRC-93 and if one is very lucky there will be a small permanent plate attached which shows that. But most often there isn't one.
The KWM-2A was introduced in 1961 for $1,250 with no accessories or options, not even a microphone. That's $13,000 today. That's why the KWM-2A is so often a military purchase. The 1958 KWM-2 ham-band-only version was $1,150, about the same as the KWM-2A in today's dollars. It's interesting how it's almost universal for Heathkit owners to replace the high-quality ceramic-insert RCA phono RF connector on Heathkit gear, but owners of Collins S-Line gear never do the same. :-)
I saw a very new-looking KWM-2A for $800 at Huntsville AL in 2022, but it had no JAN nomenclature plate. (I'm old now and I've stopped acquiring new gear...the last being a one-pound Elecraft KX2 HF portable transceiver. Some units of the US Army in the Mideast made COTS purchases of the 12-watt KX2 with internal ATU, battery, and general coverage transmit firmware.)
Still, if what I saw had been a KWM-1 I'd have considered *maybe* buying it.
I wonder how the KWM-2A package shown in the video came into private possession. MARS programs abolished their equipment issue programs many decades ago.
Mike / KK5F