this is interesting.,..looks like a gun to rebuild a picture tube.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=3037525764&category=3320

Looks like a sales display or engineering sample, Don't the replacement gun assemblies have glass at least 1" or so past the gun itself?

Interesting. Here are a few more. These came from RCA where my father worked on guns and yokes.

First pic diddn't take.

Notice this one is under vacuum. It still has the getter flash. It was an engineering sample. He doesn't remember what they were for.