Here’s a question that comes up from time to time on train forums. What do the build dates on Lionel trains mean? In the Lionel postwar era, not a lot. At least not if you’re looking to figure out the actual age of the model.
The build dates on Lionel postwar trains, and largely for MPC-era trains as well, indicate when the model was first released, not when the example you hold in your hands was built.