Terry,
Thanks for the reply. Is the picture below that I scanned from the 1957 Buyer's Guide the same one you referred to? It is the only one in color that I have found in my literature. I agree with you it looks like the "C-tines" or "C-Shanks", whatever you want to call them, are black, and the rest of the cultivator is Massey red. At least in this picture.
Sometimes the "pictures" in these older Buyer's Guides have been "colorized" by whomever is putting together the publication, and one can't always be 100% sure that the actual piece of equipment was painted those colors in the factory. However, I think all red with black shanks is very defendable for authenticity, and that is what I am going to share with him.
Unless, of course, somebody else speaks up with first hand knowledge disputing this color scheme. ;-)
Cheers,
JB