Walthers began releasing a series of wood caboose prototypes as new tooling HO-scale models in 2003. Southern Pacific's C-30-1 Wood Caboose joins the collection in 2005. SP's C-30-1 dates to 1917 for original construction. Examples are reported to have remained in operation into the 1960s. Walthers first release included four versions: SP reporting marks, SP Roman, SP Gothic, and SP with T&NO reporting marks. Two-packs were also offered for each SP version. An Undecorated example was also offered. The model is listed as ready to run, but modelers had a series of grab iron to drill and fix to the body to complete the appearance. A single C-30-1 sold for $24.98 and 2-Packs were $49.98 in 2005. A second release was offered in 2005, also Gold Line, that included three versions: NWP, SP -Radio Equipped, and SP -No Bars. This was the last Gold Line release for the C-30-1 Wood Caboose.

Late 2005 brought a Platinum Line release for Walthers SP C-30-1 Wood Caboose. Retailing for $34.98 each, three examples were offered and all featured factory-installed handrails. Another offering in the Platinum Line followed in late 2006. For 2012, the model moved to the new WalthersProto product category. Features remain similar to the Platinum Line offering. The 2012 group includes four SP variations, each retailing for $39.98.