I picked up this print at a swap meet over the weekend and the story behind it is bizarre. The Santa Fe had a class of 2-10-2s and way back around 1920 had put a 4 wheel trailing truck under the 3829, creating the first 2-10-4 in the USA. Frisco was intrigued with this idea and shortly after the ATSF experiment ran the 37 through the shop and followed suit. The engine made several round trips on the Eastern Division and showed no advantage over the conventional arrangement and was shortly taken out of service and converted back to a 2-10-2. This rare photo was taken at Pacific, MO on one of those trips. Just when I thought I had this outfit figured out, out of the blue comes yet another mystery.