BLI 4377 HO Scale S1 6-4-4-6 Duplex Unlettered Paragon4 Hybrid Era_1949+ Circuitron 800-5522 BD-2HD Current Sensing

Circuitron 800-5522 BD-2HD Current Sensing Detection Unit

1x Rear E-Z Mount

True CD quality audio in 16-bit 44

bi-directional indication

Bachmann 44501 HO Scale E-Z Track 18" Radius Curve

BLI 4377 HO Scale S1 6-4-4-6 Duplex Unlettered Paragon4 Hybrid Era_1949+ Circuitron 800-5522 BD-2HD Current SensingBLI 4377 HO Scale S1 6 4 4 6 Duplex Unlettered Paragon4 Hybrid Nicknamed The Big Engine, and appropriately so, the PRR S1 was a experimental duplex locomotive of the Pennsylvania Railroad. It was designed to demonstrate the technological advantages of the duplex drive wheels. It was recognized as having the longest (140 ft 2 inches) and heaviest (608,170 lbs.) rigid from reciprocating steam locomotive ever built. It was numbered 6100. The S1 featured