HO Model Trains Precision Craft A/B/B/A D&RGW Denver & Rio Grande Western Railroad F-3 Diesel SetHO Scale from Precision Craft Models, Inc. A Division of Broadway Limited Imports Model Number: 314 & 315 D&RGW EMD F3 A B B A Diesel Set #314A #314B, 315A & 315B *****Runs on DC ***** Both A and B units are powered Factory Painted Paperwork Lights Operational Cab Crew Window Glazing Track Tested and runs well Knuckle Style Couplers Good Interior Detail Original Box Included History: The 1,500 HP F3 locomotives were remarkably efficient and proficient