To revisit this older thread...
When I lived in Maine in the early '70s, I spent a fair bit of time in Bangor. At that time, the B&A units were in the 3 color scheme, and I guess I just assumed that was the "standard" and perhaps only paint scheme they ever had.
A few years later, after moving to Oregon, I bought a copy of "America's Colorful Railroads" by Don Ball. In that book is a picture of an F3 and Geep in the earlier pale grey colors... something I didn't know existed! 😳
And I have to say I like both schemes equally. 🙂
Mark (now) in Oregon
PS: just picked up an A B F3 set (in HO) in the early colors. I can post pictures if anyone is interested...