This set was made in 1955. I bought serial #40 at Groban Supply in Chicago. It's dirty on the outside from sitting in the warehouse for many years, but nice and clean inside. I just got it out of the truck, have not had time to clean it yet when the pictures were taken. Looks like it could be fired right up! This unit may also be known as the T-408/URT-12. Information on the internet indicates the URT-12 covers 2-30 MC, 75W carrier, AM and CW. The (option) transmitter control unit is the CANU-23423 made by (Seaboard Electric) and the PP-950/URT-12 is the 115VAC power supply. One observation is that the large-ish modulation transformer is rated 14KCT to 12K, 90 watts RMS. The modulators are 4-65's as are the final amplifiers. The unit also has built-in antenna coupling. It took 2 years of searching to find the manual.