I do not really know the story behind them. I do know SOO has SD60M's, but they already had straight SD60's. So I don't know if the SOO got the D&H's SD60M's or not. I want to say this was around 1992, so it was , I guess, "during", and not before or after, the CP takeover I guess. I know D&H tested SD60 Demonstrators around 1985 or so. It may have been in the works from before the D&H went into bankruptcy. Other than that, all I can tell you is that they were 2 windows, not 3 like SOO, and the numbers were in the 7900's (7901-7950). I seriously doubt even if the D&H had bought any that the would buy as many as fifty. That was just numbering purposes. I have heard rumors that there were shematics for SD40-2's and 8-40B's in lightning stripe livery, but I cannot confirm that. I have seen the SD60M drawings from time to time. Last set I saw on eBay was 5 years ago or so, but I wouldn't doubt that they still pop up on there from time to time. I have yet to hear anyone shine some light on these SD60M's other than what is on this thread, though.
--- Mark