I have three tubes, I believe are early TV camera tubes. I can't find anything
on the tubes. The numbers and mfg a

Vidicon Matsu****a s4131a
Panasonic/Nationa/ Matsu****a Electronics 8541B
Westinghouse wx 5157
RCA
7262a

Thanks for any help.

I also have some Mullard, Dynaco, amperex, techtronics and master 10m series
tubes.

Thanks, BU