In 1956, the PRR leased a small group of Delaware & Hudson RS-3s and all were formally purchased and officially belonging to Pennsy by 1958. They operated alongside the versions built new for PRR. Photographs show that members of this group operated until at least 1965. It is possible that all of the ex D&H RS-3s were retired and either traded in or scrapped prior to the merger with NYC to form Penn Central. By 1968, PRR had acquired much second generation power from EMD, GE and ALCo - U-boats, Centuries, GP30s, GP35s, SD35s, SD40s and SD45s.
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