Walthers Mainline 910-20664 HO Scale EMD SW7 Phase I Chessie System C&O 5218 DCC Sound Decoder - 21-Pin The early process worked well

The early process worked well enough that it was soon duplicated by the Pennsylvania and other railroads

85' Budd 10-6 Sleeper UP Pacific Union

14:1 Gear Ratio

This first release includes both original and current variations

Walthers Mainline 910-20664 HO Scale EMD SW7 Phase I Chessie System C&O 5218 DCC Sound Decoder - 21-Pin The early process worked wellWalthers Mainline 910 20664 HO Scale EMD SW7 Phase I Chessie System C&O 5218 DCC Sound From coach and freight yards to primary power for shortlines, the WalthersMainline SW7 is a perfect choice for your HO layout! Delivering 1200 horsepower from an updated 567A prime mover, the prototypes proved popular with both railroads and industrial lines, with nearly 500 produced from 1949 to 1951 with several still in service, each layout ready model is packed