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

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Model Train Help EBook

Texas & New Orleans
SP Class M-7

10 units built

Baldwin built
460 461 462 463 464 465 466 467 468 469

Baldwin built for TNO in 1902. They were the first TNO engines to be oil fired. As Class M-7 they had Vanderbilt boilers and Vauclain compound cylinders.

They were converted to simple expansion cylinders starting in 1908 and finishing 1921 and then Classed M-8. Superheaters were added between 1921-24.

All scrapped between 1928-29

D&S says that the chassis was used to build the M-21 Class 2-6-0's.


  • A Century of SP Steam Locomotives - Guy L. Dunscomb
  • SP Co. Steam Locomotive Compendium by Diebert & Strapac

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Monday, May 26, 2003