Bob Chaparro wrote:
"This Shorpy photo shows a little bit of an end door boxcar. The photo can be enlarged (click on it) to show more of the interior detail.
http://www.shorpy.com/node/18990

Schuyler Larrabee wrote:
"Both cars have plate ends. Anybody able to hazard a guess as to the car’s ID? I’ve seen less obvious cars identified on this list."

The far car is either a PRR Class X25A or (far less likely) Class X24 automobile car. The end doors of these cars have a distinct 4-strap hinge design.
http://prr.railfan.net/freight/freightphotos.html?photo=PRR_500860_X24_34view.jpg&fr=

Ben Hom