I do not know the age of the Santa Fe diesel, as my (deceased) brother was an avid train collector, and had been acquiring Lionel trains for a long time. The locomotive number is "2343". The side ladder to the cab has 2 rungs. There is a "GM" logo on the side near the aft end of the engine. When I slide over the battery holding plate, there is an imprinted number "2333-20".
I have attached the train set up as an A-B-A configuration under the Christmas Tree. (Dec 2025). The pix failed to upload! Sorry.
Let me know if a closer photo of the engine itself would assist.
Thank you in advance for any help you can provide!
aaganz