Here are a couple of shots from a 1958 235. It was unrestored but degreased at the time these images were taken. The sun was strong that day, but you can see glimpses of grey on the casting.
[img]http://www.surfacezero.com/g503/data/3764/medium/IMG_66681.JPG[/img][img]http://www.surfacezero.com/g503/data/3764/medium/IMG_6658.JPG[/img]The shade of grey used is a point of great controversy, and one that I would not claim to know the true answer.
Paul