Need help identifying a tube - Magic Eye tube?

[DIYish]

I am not so familiar with Magic Eye tubes or tubes with so weird looking, so can someone here help me to identify this tube? What is the CV number (I can only make out CV5---)?

Thanks in advance!

 

[kodabmx]

It's probably this:

 

[DIYish]

It's probably this:
View attachment 1074334

Perfect, it's exactly this one!

Thanks a lot!

 

[Alan4411]

CV51 = Y65 if you did not already get that. http://www.r-type.org/exhib/aaa0704.htm

 

[DIYish]

I found it on r-type too, but neither sounds familiar to me...😉