The VEB company tried to expand its market by making special sets for model railroad enthusiasts. These sets are rare, as they were intended to be permanently installed in model railroad scenes. The stones were 1/4 inch thick and gray. Their designs, except for thickness, were standard, so new molds were not needed. A large number of the gray "stone face" blocks were included in the box for embankments. Even today, these stones make beautiful model railroad backgrounds. And, NO, I will not sell any of my stones to model railroad people!!!