With the introduction of the new 567C prime mover that year

Each chassis has a different serial number

ACF and other builders unveiled a new generation of bigger equipment in the 1970s with increased width and height to improve carrying capacity

Inc 43853 HO Scale TEE Helvetia Express Train Passenger Car Set

Model Number: K631-1931

Lionel 6-19732 O Gauge AT&SF Bay Window Caboose #6517 ProductID_11621007 With the introduction of theThis is a Lionel 6 19732 O Gauge Atchison, Topeka and Santa Fe Bay Window Illuminated #6517 caboose from 1996. This caboose features a durable plastic construction with interior illumination, diecast metal trucks, diecast metal operating knuckle couplers, metal wheels and axles, and separately applied detail trim parts. Condition: Factory New (C 9) Operational Status: Functional Original Box: Yes (P 9) Manufacturer: Lionel Model Number: 6 19732 Years