 the prr gg1 was a class of electric locomotives built for the pennsylvania railroad (prr) for use in the northeastern united states. 139 gg1s were constructed by general electric and prr's altoona works from 1934 to 1943.for photos of the gg-1s in action, see carleton, paul. "under pennsy wires" (1977: d. carleton railbooks). entering service in 1935, the gg1 also operated on successor railroads [[penn central transportation company|pe
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