Hi,
I have a 1901 that I could sell you.
It is working fine and not yellowed, but the cover is 'typically' broken off...
Also, I would have to check if the volume and other regulators are working fine (they are sometimes worn out, so that volume does not stay steady, or screen moves up down, etc.)
I am not 100% sure if it actually is branded as 1901 ? Might be that it is branded as 'Thompson' (C= just re-branded them, and removed the Scart socket....)
Cheers,
Reini