California's Railroad to the U.S. 1861 - 1996

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Model Train Help EBook

Southern Pacific
Class MM-3

2 units acquired

3930 3931


Acquired from the Verde Tunnel & Smelter RR which ran from Jerome to Clarkdale in Arizona in 1943.

They were the last compound locos in service on the SP and were scrapped in 1954 and 1951 respectively.


  • A Century of SP Steam Locomotives - Guy L. Dunscomb
  • SP Co. Steam Locomotive Compendium - Diebert & Strapac
  • Cab-Forward - Robert J. Church
  • Cab-In-Front (The Half Century Story of An Unconventional Locomotive) - John.B.Hungerford © 1959
    • reprinted by PFM 1974

Modeling choices at the moment are:

  • For N Scale:
    • Bachmann Spectrum USRA 2-6-6-2 may be a good stand-in
  • For HO Scale:
    • ?
  • For S Scale:
    • ?
  • For O Scale:
    • ?

Articulated Index

N Scale information courtesy Phil Agur.

Home Steam Loco Index SP MoW Index Diesel Loco Index Diesel Roster Index
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Data Index PicIndex Diesel Model Info
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