Dennis,
Brian Reed's Loco Profile 26 has, I believe, a color [ or colour ] drawing of an A as its centerfold.
I seem to recall that a similar drawing appeared in a Model Railroader issue a number of years ago as part of a feature article on the initial Hiawatha -- perhaps it was their 50th anniversary issue in the mid-80's. I no longer have this issue.
Best regards, SZ