No. 6402, an F6 "Baltic,” set a world’s speed record in 1934 pulling a five-car train between Chicago-Milwaukee. Built in 1930 by Baldwin, it had 79” drivers, 26x28” cylinders, was 94’ long. Top speed on the run was 103 mph; average speed setting record over 61-mile distance was 92.62 mph; and for the full 85-mile trip, the average speed was 76.07 mph.
from "A Brief History: The Milwaukee Road"
Published by the Chicago, Milwaukee, St. Paul and Pacific Railroad Company in 1968