BN 500000-500025:
BN 500000-500025 ex CB&Q 83300-83399 (and others?)
These 52'-6", 95-ton, gondolas were rebuilt for BN by Rocky Mt. Railcar? in 199* from a variety of former CB&Q (and possibly other) cars.
It appears that these cars featured extended sides to increase their capacity to 3884 ft3 but were not fully rebodied thus retaining their original top chord.