I recently purchased a used MTH B&LE AS-616 diesel. This is a very early MTH release that has the early QSI sound system. I wanted a model of the Baldwin prototype for my collection. The MTH Product Number is 20-2134-1.
The prototype it is an interesting engine that was built by Baldwin-Lima-Hamilton. The AS616 was a 1,600 horsepower, C-C truck (meaning it was a six-axle design with all axles powered) road switcher that utilized the builder's 608 SC model prime mover, the latest and final engine it would produce.
B&LE is a short line that hauled iron ore from Conneaut, Ohio to the Pittsburg area steel mills. The Bessemer and Lake Erie bought only two AS-616's to round off their Baldwin fleet. Built in July of 1952, under Baldwin serial # 75758, Road # 409 (which was actually their last Baldwin the Bessemer ever purchased). This AS-616 had a 608A engine installed.
A prototype photo of the AS-616 is attached. Also attached is a photo of the MTH model.