Damn they're charging a premium for it too. You could still buy a whole CRT tester for that price.
Did you see this pinout chart?
https://elektrotanya.com/bk-precisio.../download.html
Here's a better copy in PDF
http://www.arcade-museum.com/manuals...RT_Adapter.pdf
It seems to be more for color CRT's by the looks of those tube numbers on the second page.