[startreksteve]

Originally Posted by Restoration73

The FRG-7700 could be supplied with the memory unit or it could be retrofitted to the
rear of the set - may explain the cables;

https://www.universal-radio.com/cata...vr/mu7700.html

I did wonder if is was related to the memory module, the guy who sold me mine had two - a cosmetically clean one without the module and a scruffy one with the module attached, I reckon he took the module off mine and put it on the scruffy one to up its value.