Bachmann 82105 Spectrum HO Scale N&W J 4-8-4 Freight Steam Locomotive #608. Bachmann Product Number: 82105. Here is a Bachmann 82105 Spectrum HO Scale N&W J 4-8-4 Freight Steam Locomotive #608. The Class J 4-8-4 was the last mainline steam locomotive to run in the United States.