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ATSF Railway train symbol 968 at the summit of Cajon Pass in California

ATSF Railway train symbol 968 at the summit of Cajon Pass in California

Train 968 shifts from the north track to the south at Summit on May 20, 1973. As the train eases onto the steep 3.3% grade Extra 8732 East comes into view from around the corner.

ATSF Railway train symbol 843 at Summit, CA ATSF train 843 at Summit

Once the switches have been realigned train 843 (Extra 8732 East) gets a green signal to proceed through Summit. Disk 51