S-40-11 Stock Cars
A roster of the S-40-11 class stock cars is provided as follows:
SP 70300-70599 SP 70620-70769
These 40'-6" single deck stock cars appear to have all been converted from box cars at some point. They featured 2897 ft3 capacity. The April 1963 ORER list 100 cars remaining.
For more detailed information, consult Tony Thompson's book Southern Pacific Freight Cars Vol. I: Gondolas and Stock Cars.