Interesting. The RCA on the left looks to be a mirror image of my BTA-1M. Mine has the control panel on the right, and the door slides open to the left. The ARRL URL says Tom is adjusting one of the classic RCA H, K and L transmitters. Model numbers ??
Also, Tom appears to be twiddling the knobs on the center transmitter yet looking at the meters on the left one!!
Photo opportunity. Grab a knob and look at a meter. Just like in the movies.