The Lionel Union Pacific FA A Unit No. 1066 was issued uncataloged in 1964. This engine would have the front coupler pocket in the front filled in and was mounted on a sheet metal frame that had a solid non-operating rear coupler.

There is no directional unit because this engine only goes in one direction, however the slot for the control lever is still there. There is no ornamental horn. Note in the picture of the top view below that a horn has been added. This diesel was not equipped with Magnetraction, however it did have one traction tire on the power truck that used a Type IVA motor. Examples have been found with the correct motor that have a light, but most of these units were not lighted. There is no weight that has been added to aid in the tractive effort of this engine. There are no variations.

While offering "stripped down" versions of their diesel’s was not something that they were proud of, Lionel, none the less, sold a lot of these engines to "mass marketers" because of their low price (under $15.00) that allowed them to take advantage of the Lionel name. However, the "chickens always come home to roost," and as a result of the poor quality inherent in these engines Lionel’s reputation suffered. Today, because of the abuse these engines took, they are hard to find in good condition, and are under valued by collectors.

This engine was issued to run on sets that came with O27 Gauge track, but it will run equally well on the larger radius of O Gauge track.