4-6-6-4 "Original" Challenger - YouTube

Challenger Class Steam Engine

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4-6-6-4 "Original" Challenger - YouTube

Challenger locomotive

4-6-6-4 "original" challenger

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Union Pacific Challenger type 4-6+6-4 steam locomotive # 3… | Flickr
Union Pacific Challenger type 4-6+6-4 steam locomotive # 3… | Flickr

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UP Challenger #3977 - www.rgusrail.com
UP Challenger #3977 - www.rgusrail.com

Challenger locomotive challengers 1943

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Close up detail of Historic Challenger locomotive steam engine during
Close up detail of Historic Challenger locomotive steam engine during

4-6-6-4 "Challenger" Locomotives in the USA
4-6-6-4 "Challenger" Locomotives in the USA

Union Pacific "Challenger" 3977 (1943) The Challengers were the direct
Union Pacific "Challenger" 3977 (1943) The Challengers were the direct

FS: MTH Premier Great Northern 4-6-6-4 Z-6 Challenger Steam Engine 20
FS: MTH Premier Great Northern 4-6-6-4 Z-6 Challenger Steam Engine 20

Locomotive profile: 4-6-6-4 Challenger type steam locomotive | Trains
Locomotive profile: 4-6-6-4 Challenger type steam locomotive | Trains

10 Largest Steam Locomotives Ever Built - Largest.org
10 Largest Steam Locomotives Ever Built - Largest.org

Union Pacific Challenger Steam Locomotive 3977 - YouTube
Union Pacific Challenger Steam Locomotive 3977 - YouTube

Union Pacific #3985 Challenger Steam Locomotive at Pacific… | Flickr
Union Pacific #3985 Challenger Steam Locomotive at Pacific… | Flickr

4-6-6-4 "Original" Challenger - YouTube
4-6-6-4 "Original" Challenger - YouTube

Western Pacific 4-6-6-4 Challenger type steam locomotive. … | Flickr
Western Pacific 4-6-6-4 Challenger type steam locomotive. … | Flickr