Owned exclusively by Union Pacific, EMD's DDA40X was built between 1969 and 1971 with 47 examples produced. The
double diesel produced 6,600 horsepower and know as the Centennial. The DDA40X is the most powerful and longest diesel locomotive
The first plastic model of EMD's DD40X arrives in 1980 from Bachmann in HO-scale. Bachmann would
later enhance the model and offer it in the company's Spectrum line. More recently, Bachmann has installed a DCC decoder
and presented the DD40X in their DCC on Board series of releases.
Athearn's Genesis series of high end HO-scale releases introduced a DD40X to the line in 2012.
The Genesis DD40X features numerous separately applied parts and state of the art tooling. Athearn presents the model in
standard DC and DCC Tsunami Sound equipped examples.