Rebuilt from an ex-Penn Central (PRR) ALCo RSD-12.

Rare and Rarer...Rare goes to 1 of 20 CSX SD70ACes...Rarer to 1 of 10 CSX MT-6 slugs...#4839 would soon lead AC44 #5120 on West Springfield bound Q424-06 after turning on the loop and heading over... (more)

You don't see one of these everyday: Slug 983 in CR blue was the fifth engine back on today's 34A.

See Photo #40954 for a look at one of these in NS paint

Ex-Conrail 1122. Started life as Pennsy RSD-12 #8677, then became PRR 6877, PC 6877, Conrail 6877. Rebuilt into this form in July 1977.