RailKing Line Edition of Engines, Sets, Track Systems and Promotional Items Digital Reference Book 60-1368
MTH Electric Trains O Scale Premier ES44AC Diesel Engine w/Proto-Sound 3.0 (Hi-Rail Wheels) 20-20314-1
Connecting Europe O Scale Premier TRAXX F140 AC-1 Electric Engine w/Proto-Sound 3.0 (Scale Wheels) 20-5669-2
Connecting Europe O Scale Premier TRAXX F140 AC-1 Electric Engine (Non-Powered Scale Wheels) 20-5669-6