Here are a few photos of 70 ton covered hopper models.
The Atlas Master Line 1958 cubic foot hopper was built for sand and cement service. By the late 50s larger cars like the PS-2 could hold 800 to 1000 more cubic feet and carry grain economically.
A Lionel 2003 cubic foot PS-2 is in front, a Atlas Trainman PS-2 in the middle and an Atlas Master Line PS-2DC 4427 cubic foot 100 ton hopper in the back.
A thread on 100 ton covered hoppers can be read at the link below.
