I have placed some photos illustrating the Duryea underframe in a
Yahoo photo album at
"new.photos.yahoo.com/b_and_o_boxcars/albums" (minus the quotes).
These photos are of M-53 boxcar 381538 located at the Florida Railroad
Museum, Parrish (Willow) FL. (www.frrm.org), just south of Tampa.
Note that the Railroad Prototype Cyclopedia #9 has photos on pages 17
and 19 that show some of the parts visible from the sides of the cars.
The album also has pictures of M-15NA #374834 and M-15PD #376330 which
are also located at the Florida Railroad Museum. These two cars do
not have the Duryea underframes.