From another Forum...
SP stock car #182 was built by the Nevada-California-Oregon in its Reno shop with an in-service date of July 1, 1919. Used parts from flat car #55 which had a built date of July, 1909. The N-C-O constructed stock cars using parts from dismantled or wrecked flat cars.
sold to Southern Pacific and numbered 552 in 1930
renumbered as part of a general renumbering of ng cars (1946-47) to SP 182 on 12-7-46.
The other car is probably a rebuilt by adding the superstructure of a stock car to a flat car. Without a number the exact history cannot be traced. But the sidesill has the shape of the flat cars built for the Carson & Colorado that were converted to stock cars in the mid-19-teens.
The ex-N-C-O stock cars were/are noticeably larger than many other SPng stock cars.
Brian Norden
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