The unit is clearly under test, there are cables coming out of the cab window and wrapped around the safety railings along the long hood, and there is a gentleman concerned about something behind the engineer's door. According to the January 1993 issue of Trains Magazine (page 54), in a six year production run, 1255 units were built for USA customers. No SD45's were built new for Canada or Mexico, however, EMD built three more demonstrators, #'s 4352-4354, which were sold to the D&H, were swapped to the E-L for GE power, went back to the D&H, and ended up in Mexico. The first production SD45 was sold to the GN for $276,000.00, numbered 400 and given the name "Hustle Muscle", a name carried over when it was repainted BN green and renumbered to 6430, recently restored to GN paint and number.