Look at eBay listing 230873019970, a nice slide pic of SLSF 1200, the class unit of the Frisco w/v caboose fleet, renumbered from its original SLSF 200 number. What kind of truck is this puppy sitting on? Don't know if I've seen this truck before. Ken ps - Sure enough, this truck is on several other pics of 1200 I have. But, not on its new delivery pic as SLSF 200, which had the standard truck found on this series of Frisco caboose (don't know what its name is). This different truck must have been some Frisco experiment of a different type after 200/1200 was in service. Gotta do some research!