Vintage KRIS 23+ Vacuum Tube Base Station CB Radio w/ Microphone

Description

Here we have a
Vintage KRIS 23+ Vacuum Tube Base Station CB Radio w/ Microphone
This has had limited testing as I no longer have an antenna suitable for CB.
The unit powers up and I checked all the vacuum tubes and they test ok.
They all light up and once powered, after about 15 seconds, Static can be heard from the built in speaker.
I tested the mic on an oscilloscope and once clicked it was registering my voice on the screen.
I know I am not supposed to, but I very quickly keyed the mic and it went into transmit.
This is as far as I got with testing.
I have no idea what the quality of its transmitting is, nor do I have any idea how it sounds to others.
Also there is a switch on the back that looks to be some upgrade perhaps. Inside it goes to some more crystals... Not really sure what they are for.
As I cannot test it to its full extent, it is sold AS IS for PARTS OR REPAIR with NO RETURNs.
Thank you for looking.