That meter unit looks like the predecessor to the digital one i have from my dad doing it in the 70sMy guess is the 6 meter HAM band, 50-54 MHz, is either a receiver or transceiver. It can do USB, LSB, (voice) or CW (Morse code).
This being an older unit may have access to a slightly different frequency. I usually associate USB and LAB to the 2 to 30 MHZ range. I could be way off on my 50 - 54 MHZ range.
The rectifier takes the AC power and makes DC power. Looks like a dangerous AC hookup with exposed fraying wires. I think the open cannon plug would power multiple units or multiple DC voltages to a single unit.
That is eBay, but at a Ham Fair they are asking for a fraction of that price.Ebay has it selling/listed for 150 to 499 in various stages of functionality...
My dad and I set up at ham fests and fle markets over 40 yrs strait, buying and selling. I've had the icom model in a 2-meter and like yours it is a Transceiver TX and rec. They were a nice unit in their day. They were and "all mode" unit working in most all modes such as upper/lower side band /fm / cw. If clean and working right, not scratched up or banged up should bring 150. to the right person. The issue it is 6-meters and only a select amount of people (Hams) bother with that band and most seem to like AM as well with 6-meters. So, if you have nothing in it, don't bother to make sure it works right or clean it up then Robby's opinion comes into play. Back in the 80's/90s a nice one would bring 350. or so but they just are not popular. 2-meter was more attractive to a larger group.Ebay has it selling/listed for 150 to 499 in various stages of functionality...