SP had what they called DH-643s. Are these the same you are referring to?? Here is #9152: For more pics, try here SP DH-643s You can also look on Richard Percys SP Homepage
Yup...thats it! Thank you very much for the photo!!!! I wonder why these never get the recogniton the DD40s do? I realize there weren't as many, but, still, they are just as "cool", if you ask me.
Ah... One of my favorite ugly engines. Alco's other double-engine hood unit, the C855, never gets much recognition either. There were only three of them, too: two A-units and one B-unit.
I've only seen about 1 really bad pic of that monster..the 855; and read almost NO info on it. I'd REALLY love to have an operating manual from one of those...or, the 643! Anyone? Anyone?