2124 was later used by the RDG to pull their Iron Horse Rambles excursion fantrips across the railroad's network between 1959 and 1961.

2124's flue time expired, and it was sold to F. Nelson Blount, who added it to his Steamtown, U.S.A. collection.

2124 remains on static display at Steamtown National Historic Site in Scranton, Pennsylvania.

2124 was primarily assigned to pull freight and coal trains on the RDG's mainline and certain branchlines throughout Pennsylvania and New Jersey.

[1] All T-1 locomotives were withdrawn from revenue service by 1954, but two years later, some were returned to remedy a traffic surge on the RDG and the Pennsylvania Railroad, before they were retired again.

[3]In 1959, the RDG decided to run their own steam excursion program, dubbed the "Iron Horse Rambles", and the trains would be powered by T-1 locomotives.

2124 operated outside the RDG and pulled the Lehigh and Hudson River Railway's centennial train between Maybrook, New York and Belvidere, New Jersey.

2124 pulled its last Rambles excursion on October 22, 1961, before its flue time expired the following year, and the RDG replaced the locomotive with another T-1, No.