03-15-2013, 08:31 AM
I've always been a little fuzzy on the difference between an SW9 and SW1200. I think it even comes down to the number of lovers in the small vent behind and below the cab -- not a biggie! You're exactly right, that among the late SW9-1200s, there are bigger spotting differences among orders by the various railroads, like fuel tank size, MU, roller bearings, horns, side handrails, flexicoil trucks, etc etc etc than in the stock details common to all units from the factory.