Lehigh Portland Cement covered hopper car.
Yes, Marx has the same car. The Model Power color is not quite the sama as the Marx. Other spotting differences are:
1. By the placement of the info under the number. On the Marx car, the info is centered, on the Model Power car, the info is to the right in the panel.
2. The "LDWT" on the Marx car is "50300" and on the Model Power car it is "50900". Beware that someone has tried to put a Model Power car body on a Marx frame.