How do you tell (or can you tell) if a covered hopper is used for cement, or grain, or other loading. I am asking concerning physical/mechanical devices on the car such as top hatches and hopper unloading equipment as opposed to lettering, stencils or weathering.
Specifically I have three Kato HO scale 2 bay covered hoppers lettered for Milwaukee Road. The lettering indicates blt date of 1949.
