Union Pacific Big Boy Collection @pentrexvideos
Union Pacific Big Boy Collection @pentrexvideos
Uploaded June 2007 | Updated September 2026, 54 minutes ago
The biggest, the strongest, the grandest American steam locomotive. Only 25 were built and now — for the first time — Pentrex shares ALL 25 of the Big Boys in action in the most incredible display of steam power ever!
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Union Pacific Big Boy Collection

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