Based on the 242 cars built to plan #3979-A between 1928 and 1930. The model represents cars modernized in the 1930s with mechanical air conditioning, some of which ran into the early 1960s. Some were converted to maintenance-of-way sleepers and used into the 1980s. These fully assembled HO Scale cars feature scale dimensions and rivet details, factory-installed side door handrails, full detailed interiors, complete end, underbody and roof detail, scale set-back windows, working diaphragms, car name and number decals, correct trucks with RP-25 metal wheels for each car, factory-installed electrical pickups, removable roof with air conditioning ducts, working McHenry knuckle couplers and swinging drawbars to improve curve performance.