Southern Pacific 2-10-2 Class F-4 3680 was built by the Baldwin Locomotive Works in 1922, and was one of 50 locomotives in this class that was delivered in a single train named "The Prosperity Special". They had 63.5" drivers, 29.5 x 32 inch cylinders, operated at 200 psi boiler pressure, and could exert 75,145 lbs of tractive effort. SP 3680 was used on the Coast Line in California and was scrapped by 1958.
