Dan sorry for any confusion. My post was referring to the 3/16” scale proportioned steam locos American Flyer made for 3-rail O gauge circa 1940. I’ve looked at them with curiosity many times myself. I’m pretty sure they would run slower and with more control than any of Lionel’s traditional-sized prewar locos like the 1666, etc.
Some of them (such as the Reading Atlantic) morphed into the well-known American Flyer S-gauge after the war.
