The E7 locomotives (designated class EP20 by the PRR) were produced by GM's Electro-Motive plant at La Grange, Illinois. In all, 428 "A" units and 82 non-cab "B" units were constructed, making the E7 the most numerous passenger diesel locomotive ever built by any company.
Pennsylvania Railroad
EMD EP20/E7A
No. 5901
This Pennsylvania Railroad EP20 class passenger diesel was built by EMD in 1945. It, along with its now defunct sister No. 5900, were the first pair of passenger diesels delivered to the PRR.