Can anyone tell me about old TV Zoom Lenses?
 

I have a couple of old Canon TV Zoom Lenses and I was wondering if anyone here might be able to tell me what I have, if they can still be used with anything and if they have any value. The only numbers that I can find on one of them is on an info tag which says "No: 21053M" which I would assume is the serial number. On the other one it says "No: 21040M" and on the side I can read the numbers PV18X11B and there are a couple more letters that I can't read. These measure about 12" x 12" and are about 21-1/2" long. I was hoping to be able to attach photos but I am new to this thread and the posting rules say "You may not post attachments". Any information that someone could give me would be greatly appreciated.

The are generally sized for a 2/3" chip camera or smaller.

If they've inside a box type housing, which 12" x 12" suggests, they could be for studio cameras. The sensor/tube size in that case could be 2/3" or larger, I assume they're 11mm at the wide end with a zoom range of 18 times