Did they have more than one boxcar with the Susie Q logo on it? For some reason i remember reading about it but am not sure.
More than one.
Some examples notice road numbers 506, 501, and 502
(http://www.rr-fallenflags.org/nysw/nysw506akg.jpg)
(http://www.rr-fallenflags.org/nysw/nysw501.jpg)
(http://www.rr-fallenflags.org/nysw/nysw502akg.jpg)
Oh cool, thanks for the pictures.
photos at fallen flags also show 504, 507 and 512 painted the same way.