Direct current with factory-installed speaker and 21-pin DCC plug, $219.98; with dual-mode ESU LokSound V5 sound decoder, $319.98 Manufacturer: Wm. K. Walthers Inc., 5601 W. Florist Ave., Milwaukee, ...

HO scale model trains are a significant part of model railroading history, and we can partially credit the overall popularity of model trains with the rise of a convenient, tabletop scale like HO.