I'm not sure. Tough to buy a 50 year old piece of hose.
I guess if the car wasn't driven much and you were looking for a all stock original you'd take it.
When I looked for one for my car, did some research. I found a 1967 picture out of Popular Mechanic.
It was a half page pic with a guy working on a 67 383. You could clearly see the upper radiator hose and no number or marking visible.
With that I just bought one to fit the car and engine.