Prototype pair of the Lionel 18217 Illinois Central SD-40 diesel locomotive. Both units are unpowered and show some minor wear. One unit has some paint chipping from the hand rails on one side. Of note: It appears that both units had the last digit of the cab number changed at some point. The "7" appears to be a later hand painted / lettered detail.
This item will include a certificate authenticity from Stout Auctions and Lionel stating this specific item came from the Lionel Archives. This is 100% bullet proof provenance and is absolutely the best piece of documentation you can get, period.