SAL 18000-18999
SAL 18000-18999 (to SCL 818000-818999)
These 50 ton, 40'-6" automobile box cars were built by PS (lot 5551) in 4-5/1937. They featured 6' doors, flat ends, flat roofs and 3311 ft3 capacity. They were of the 1932 ARA design.
There is a nice article on the history and modeling of one of these cars by Tony Thompson on his blog.