An interesting photo on this site is of CNW 128698, a double sheathed box car from 1912. What I found odd was the dark lines or shadows spaced along the side sheathing, making it look somewhat like the panels of a steel sheathed car. What is it in the design that gives this appearance?
http://www.rr-fallenflags.org/acfx/cnw128698asw.jpg

Rob Kirkham