These 2 Double Bedroom/1 Compartment/1 Drawing Room Observation Buffet Lounge cars were smooth side and built originally for Southern Pacific and New York Central for use on the Lark and the Southwestern Limited. The NYC cars were sold in 1956 to the Baltimore & Ohio for use on the National Limited. The kits come with the sides and a rear door piece and require an Eastern Car Works Observation Kit available from your hobby shop or Walthers. Advanced modeling skills are suggested.