Although looking like a WDG3A, this is a WDS6 AD or ADT (depending on the source of reference). One can infer the smaller power pack by the size of the radiators. Note the high adhesion trucks (the "AD or ADT" in the nomenclature) and the high short...

Although looking like a WDG3A, this is a WDS6 AD or ADT (depending on the source of reference). One can infer the smaller power pack by the size of the radiators. Note the high adhesion trucks (the "AD or ADT" in the nomenclature) and the high short hood without dynamic brakes and thus the missing topside brake grid vent.