In the middle or late 50's, my Dad bought a used Lionel set. The engine was a switcher. The cab was in the middle, like a GE 44-ton, but the hoods were longer. In the 70's, I sold it. About 15 years ago, I went to a train show and was talking to a dealer about it. He was VERY interested in it and wanted to buy it. I always wondered about that switcher. Does anyone know about these switchers? When did Lionel make these, how many did they make, what are they worth, what prototype were they modeled after, etc. ?