1940 Lionel Prewar set includes 204 locomotive, 2689 whistle tender, yellow 654 tanker, 657 caboose and additional auto coal car with load. Set includes UCS remote track, original prewar track clips, transformer (use caution if using transformer-may need refurbishment). Original boxes as shown in pictures. Very nice time capsule from 1940. The Lionel #204 was a prewar O gauge steam locomotive produced in the 1930s until 1940, known for being a more accessible model for collectors. It was part of a range of prewar locomotives that were built with tin-plated steel rolling stock. Today, collectors seek out these prewar models for their historical value, often restoring them to running condition. Materials: These engines were primarily constructed from tin-plated steel and diecast, which was then painted with bright enamels. Coupling: Some prewar cars, such as the #204, were often paired with a tender that could have different types of couplers. Some versions of this model also had knuckle couplers. Restoration: Many #204 locomotives have been restored by collectors, who polish the drive rods, clean the engine, and replace decals to keep them in good working order. Value: The value of a prewar #204 depends on its condition and features, but it is considered a classic and sought-after model. How to identify a Lionel #204. Bottom plate: The engine’s bottom plate often has an identification number, though it can be hard to find. Model number: The number “204” is often stamped on the bottom of the locomotive.