Here is one that Lionel didn't follow the prototype in postwar production.
When originally advertised in the mid-1950’s, Lionel had a much different vision for the paint scheme on their 2240/2367 Wabash F-3’s. They were to be much more like the real loco’s with black underframe, silver trucks, white nose, long bottom and short middle white stripes and tapered upper gray area. The prototype was painted this way and had the number 2240 on one side and 2367 on the other. The actual production units had a much blander paint scheme and the Lionel prototype went into the archives. In 2017, the prototype surfaced when Neil Young auctioned off part of his collection.
Go to the METCA website (it's org not com) and click on store for the rest of the story.