From what I can tell, most of the old timers used Primo, Deca, Dbol and Winny for most part.
Primo was like what test is now....all the guys used it. Kind of like the staple of all cycles.
I think you're right though; from what I've heard, arnold mainly used Primo and Dbol.
Actually, I don't think test became that big until the early 90's. Test, Insulin, HGH..etc. took bodybuilding into the next century. That's probably why it's not uncommon to see 300lb bodybuilders now.
Tom Platz for example used mainly Primo and Winny...or so he said.