Affectionately know as "Little Buttercup", RMO#1 pulling BN caboose #12433 on the grounds of the Railroad Musuem of Oklahoma. The General Electric switcher, formerly owned by Vulcan Materials Company, is occasionally used to shunt cars about on the museum's trackage. Home to Frisco 4-8-2 #1519, the museum has a variety of cars, including cabooses from nine different railroads. Some of the cabooses are occasionally used on short excrusions to local communities.