In a fleet of 425 K4s, a few stood out from the rest. Always striving to improve on perfection, the engineers in Altoona made modifications to several K4s over the years. Both mechanically and aesthetically, these experimental locomotives met with mixed reviews. But the excitement is in the variations and the details and so we’ve selected three of the more unique examples as candidates for our latest brass-hybrid models. Each is presented in at least one prototypical, one fantasy, and one unpainted “pilot” variation for you to enjoy. For those looking for a little, or a lot of extra flare, these K4s should answer the need. These brass-hybrid K4s all feature a die-cast chassis with a hand-built brass locomotive body along with a die-cast tender; all with the details and great LEGACY features as found on the standard K4s in this catalog. You’ll also get road-number specific dialog!