BACHMANN PENNSYLVANIA RR #2665 STREAMLINED K4 LOCO/TENDER. N SCALESTREAMLINED K4 PENNSYLVANIA RAILROAD #2665 Model: 53952 Scale: N 1: 160 At the close of the 1930s, American railroads were steaming forward with a wave of improvements to the passenger experience. Lightweight coaches, streamlined designs, and new forms of locomotive propulsion were fast revolutionizing the industry. In some cases, legacy steam locomotives were also upgraded to meet these new design standards. Between 1940 and 1941, four Pennsylvania