[Tazman1966]

Sorry if this is a bit off topic but here are a couple of pics of the aforementioned Dynatron with the A65 120X tube also confirming that it is the squared off corner type the same as the A66 120X and A67 120X. It's the only CRT with this designation that I've seen. I can't remember who I gave this set to now after I'd got it going.