UP B-50-32:
UP 191000-192999
These 40'-6", 50-ton, box cars were built by UP Shops in 4/1941-6/1943. They featured 6' doors and 3902 ft3 capacity.
A number of the cars from this class were stretched from 40' to 50' cars and reclassed as BF-70-5, BF-70-6 and BF-70-7 class cars.