Atlas O F-2/F-3 Phase 1 Locomotive EMD Demonstrator [3-Rail TMCC] Produced exclusively for the Golden Spike Club 2008. Four engines, 2 A Units and 2 B Units, in two cartons sealed. I opened one engine box to take photos for description. I will not open the other boxes. When removing the engine one of the rear ladders broke off. I assume it can be repaired. These cartons have been in a dry climate controlled storage since 2008. I will try to answer any questions but I do not know much more about them. The carton that I opened weighs 17.4 pounds. The other carton weighs 14 pounds. I do not know if the second carton engines are powered or unpowered due to the weight difference.