Thanks guys. The reason I asked is that I found a B&K1077 on Ebay but it has no CRT. So I think I can get it for $5 (plus shipping).
https://www.ebay.com/itm/18646549509...3ABFBM-LLCpKVl
Here's where I come in. I have an unknown tube that I think will work. Its a Motorola tube that I think is a flying spot scanner tube. I connected it up once and it glowed purple. I think its either military or medical. Has an attached HV lead.