Locomotive historians have had a difficult time deciding the actual model designation for the 800. In actual technical EMD model terms, the unit was built as a late F3. Although it was never a formal model designation, this was also termed an “F5,” since it was a transitional period from the F3 to the F7. The 800’s dynamic brake fan follows standard F3 design practice, since it’s internal, rather than externally mounted as on a standard F7. The fan is beneath the two grills in the roof panel immediately behind the horn. In any event, the 800 was fully upgraded to F7 specs in 1952 so that's what we'll call her. Here, the veteran cab unit powers the 1979 Santa train at Hardwood, VA. The Family Lines paint scheme was new at the time—its third and last Clinchfield scheme. In fact, it had been released from the Erwin paint booth just two days before this run.