Sam, nice pics, but that's not actually "vintage." Those date back to 1973. The 980 is a 1972 model. The 1500 and 1400 were made from 1973 to 1979. They were for the N.A. market, while the top pic model was a European market of like period. I cannot ID the all-yellow NH/Clayson in the last pic, but it is an older than the above. The 1968-1971 Model 990's and 980's still had the other yellow points, but their feeder houses were red. The 1973's marked the transition to the solid yellow 1400/1500's.
Go back to your Bill Huxley book of combines for some real vintage Claeys and Clayson [I'm still trying to figure how that name really got started
] as well as other older New Hollands.
I also have a short video somewhere on my You Tube gallery, of an older "Clayson" in action.