Charlie and Dave,
By coincidence I ran across a couple drawings of these cars in our archives last weekend which were done by J.E.Robinson, 25 Nov. 1967. On the drawings it says that they were numbered 030-037 and in service 1901-1909, sold to Montana Southern in 1918. This drawing is labeled F&CC. The second drawing is noted as Mon. Sou. #306 measured at Virginia City, Montana by J.E.Robinson, 25 Oct. 1967. There appear to small differences between the two drawings. The back of both drawings have the ink stamp "Available From Coronado Scale Models" and their address. One notable difference is that in the F&CC configuration the cars have a small deck at each end while on the Mon.Sou. car the body extends clear to the end beams.