This is the Atlas 10003012 ALCO RS-1 ATSF Santa Fe #2395 in blue and yellow, in HO scale. The picture might show a different road number. The RS-1, introduced by ALCO in March 1941, started a locomotive design revolution. It combined the accessibility of a switching locomotive and the high - speed tracking of a road unit. Despite the introduction of higher - horsepower roadswitchers by ALCO, the 1,000 h.p. RS - 1 was produced for 19 years (1941 - 1960), with 623 units. Key features include a retooled die - cast metal chassis, fine - scale handrails, Golden White LEDs, and separately - applied wire grab irons. It has a DCC/Sound version with a LokSound decoder, accurate painting and printing, AccuMate® couplers, and a realistic die - cast mainframe. The five - pole skewed armature motor with dual - flywheels ensures great performance at all speeds. Directional lighting is also included. The undecorated version comes with both friction and roller bearing truck sideframes. For the Gold Series, in DCC operation, it supports all programming modes, has flexible function key mapping, and six function outputs, following NMRA standards. In analog (DC) operation, the LokSound Select Dual - Mode decoder allows use on both DC and DCC layouts, though there are some limitations. It offers over 20 sound effects, multiple user - selectable horns, bells, and brake squeals, along with manual and automatic notching modes for realism.

Using your Atlas ALCO RS - 1 locomotive is a breeze. If you're using it on a DCC layout, just connect it and start programming using the supported DCC - programming modes. You can customize the function keys F0 to F28 according to your preference. On an analog (DC) layout, thanks to the LokSound Select Dual - Mode decoder, you can still use it, but note that the Atlas Quantum Engineer won't work here. You can control the sound and lighting with a basic DCC system. When running the locomotive, enjoy the over 20 sound effects that add to the realism. You can switch between manual and automatic notching modes while it's running. For maintenance, keep the locomotive clean. Wipe it gently with a soft cloth to remove dust. Check the wheels and couplers regularly for any signs of wear. Make sure to store it in a dry place when not in use. Also, remember that on a DC - powered layout, you can't couple a DCC and sound - equipped locomotive like this one with a locomotive that doesn't have both DCC and sound.