You are correct. It was the 2353 Santa Fe with a 2333-20 chassi. Kind of figured it out by looking at other on-line sellers. Also received positive feedback from others. Makes sense, chassis of Lionel 2333 carried over to newer models. I'm new to this hobby but can Lionel make things anymore confusing? They make one thing then 1,000 variations of the same thing. I should get a mulligan on this one. Thanks for your help. EdA