Often called the white set, this was the first boxed set produced by Marx Trains. It was announced in 1995. There were 3 versions, 10251M, 10251S & 10251C. The alpha was not always printed on the box. The difference was the hopper, M= Monon, S= SOO and C= C&O. I only have the M & S sets, still looking for the C. Sold separately later was a white lumber car and a white flat car with white reels.
10251M
10251S
