HO AC4400CW Locomotive UP Flag 6700 (ATHG31691)

HO AC4400CW Locomotive in Union Pacific Flag livery, number 6700, is a highly detailed HO-scale model designed for serious model railroaders and collectors who want an accurate representation of GE’s AC4400CW in UP service. This UP Flag variant recreates UP 9997’s early test and frontline appearance, featuring the signature yellow frame stripe and a Nathan K3 horn for prototype realism. The model captures a range of UP details from early production units—such as a large plow, low-mount number boards, and pilot-mounted ditch lights—while delivering a faithful paint finish, see-through cab windows, and a full cab interior that enhances both display and operating layouts.

On the layout, this locomotive combines authentic performance with modern operation: a DCC-ready chassis with Quick Plug technology and a 21-pin NEM connector, and a Genesis driveline with a five-pole motor housed in a heavy die-cast frame for smooth, powerful pulling. Prototypical lighting includes illuminated number boards, front and rear walkway lights, and ground lighting above the front truck, with marker lights where applicable, along with etched walkways and fine-scale handrails. Sound-equipped variants feature a SoundTraxx Tsunami2 decoder with dual speakers and full DC/DCC functionality, while non-sound versions retain the same visually faithful detailing—fuel tank with fillers and gauges, brass horns, McHenry scale knuckle couplers (Kadee compatible), and RP25 wheels—delivering a convincing, versatile model ready for both display and operation.