Part of a batch of twelve S-10 Class 0-6-0 switchers built by the Baldwin Locomotive Works in Philadelphia, PA, for the Southern Pacific in 1913, #1221 was one of the first “modern” steam switchers on the railroad, equipped with superheating and piston valves.
Switchers worked in a variety of settings making up freight trains or hauling rail cars to customers’ yards. Some larger passenger terminals had their own switch engines, which were sometimes "dressed-up" for work on passenger consists. #1221 was the San Jose, CA, depot switcher at both the Market Street and Cahill sites and appears in historic photos to have had a grey-green jacket and chromed lettering and numbering in this way.
#1221 weighs 154,600 lbs. An oil burner with 51” drivers and 19” x 26” cylinders, it operated at a boiler pressure of 190 psi delivering 29,720 lbs tractive effort. It was donated to the City of Deming, NM, in 1960 and is on display at the Deming Visitors Center opposite the Deming Police Station on E Pine St. You can see other S-10s on the SP #1237 and SP #1298 pages of this website.
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