Kennecott Copper Corporation 
 
Nevada Northern Railroad Museum Exclusive 
 
Museum-Quality O Scale by Sunset Models 3rd Rail
 
Sunset Models 3rd Rail proudly brings the NNRM RSD-4 to O Scale 2-Rail and 3-Rail, capturing the proportions, detailing, and mechanical character of this classic Alco with museum-level accuracy.
 
Each model is engineered for serious operators and high-end collectors, combining durable construction with fine-scale detail.
 
 
Each locomotive is produced with road-specific Reading details, avoiding generic tooling and reflecting prototype variations.
 
 
Model Features
 
• Precision ABS Plastic Shell with Die-Cast Metal Chassis
• Fine Brass Detail Parts — grab irons, handrails, pilot details, MU hoses, lift rings, horns, and rooftop fittings
• 3R O54 and 2R 48" compatible 
• Road-Specific Details — lighting arrangements, horn placement, number boards, exhaust styles, and appliance layouts per prototype
• Powerful Can Motor Drive for smooth, quiet performance
• All-Wheel Drive and All-Wheel Electrical Pickup
 
 
Electronics & Control Options
 
• Advanced electronics: 3R ERR Cruise/TMCC/Railsounds compatible with TMCC/Legacy/DCS, 3R Conventional for your choice of sound, and 2R ESU Loksound 5.0. • OEM Blunami Upgrade Option Available in both 2-Rail and 3-Rail
• OEM Blunami Upgrade Option Available for both 2-Rail and 3-Rail
• LED Lighting Suite: headlights, numberboards, and backlit gauges
• ERR Cruise Compatibility: Legacy, DCS, TMCC, and Conventional control systems
 
Smoke is not available in 3-Rail units due to space constraints.
 
Minimum 20 needed to be reserved to be produced