Mysterious RCA radio

[MIPS]

I dragged this out of a landfill almost a decade ago and I've never found any information about it.




Details about it are very limited other than what I can find from markings on the back:

-It's a VHF-FM transmitter
-It's from the 700/700C series, type CSCL4AJA
-it's got a 25W power rating
-Using specialized modules, you can choose four different transmitting and receiving frequencies
-Two frequencies can be selected from the front. There's also unlabeled momentary and NO/NC buttons that appear to be user pinnable for custom applications.

I can find absolutely no information about it online. Zero documentation at all. It's obvious someone has made wiring changes at one point or another but I have no way to know what they've done. The relay isn't a factory job. Neither are two random loose wires. Might this ring a bell to anyone? Right now it's tuned to 14.266mhz transmit (that looks like an AR frequency) and 18.277mhz receive.