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Challenger 4-6-6-4 Steam Engine,

HO Scale AHM Rivarossi 4-6-6-4 ,

HO Rivarossi 4-6-6-4 Challenger Union Pacific 3979 1592 Gray,

Challenger 4-6-6-4 Steam Engine,

Delaware & Hudson LionMaster TMCC 4-6-6-4 Challenger #1527,

HO Rivarossi ,

Rivarossi's 4-6-6-4 Challenger - YouTube,

RIVAROSSI HO SCALE 1591 UNION PACIFIC 4-6-6-4 CHALLENGER,

Broadway Limited 6985 N UP CHALLENGER 4-6-6-4, #3977, MUSEUM,

AHM Rivarossi 5112-02 Union Pacific UP Challenger 4-6-6-4,

6985 UP Challenger 4-6-6-4, #3977, Museum Version, Two-tone,

Rivarossi,

Rivarossi HO NYC Dreyfuss Hudson 4-6-4 Review and Run - YouTube,

AHM Rivarossi 5112-02 Union Pacific UP Challenger 4-6-6-4