The Southern Pacific Railroad Locomotive No. 1673 is a standard gauge 2-6-0, Mogul type M-4 class, steam locomotive built in 1900 by Schenectady Locomotive Works. It had a brief starring role in the 1954 film Oklahoma, for which it was fitted with a diamond stack and other turn of the century equipment and colors. It was also the star of Southern Pacific's 75th anniversary in Tucson, Arizona. The locomotive is on display in the Southern Arizona Transportation Museum, 414 N. Toole Ave.. It was listed in the National Register of Historic Places on January 9, 1992, ref.: #91001918.
Following is a list (in serial number order) of preserved Schenectady locomotives built before the Alco merger. All locations are in the United States unless otherwise noted.