This is S-scale, 3/16th to the foot or a proportion of 1:64 to reality.
A.C. Gilbert bought a line of O-gauge toy trains around 1937 called the “Chicago American Flyer Trains”. Gilbert marketed these as “American Flyer Trains” and made the die cast 1/64th tooling for their steam engines from 1938 to 1942 though they ran on O-gauge 3 rail track similar to Lionel trains.
In 1942, the National Model Railroad Association designated 1/64th scale models (1/2 of the old #1 gauge) as “S” scale. Following World War II, the AC Gilbert Co. introduced the American Flyer S-scale trains using 2-rail S-gauge track. Although more ‘scale-like’ they could never quite compete against Lionel. American Flyer was sold to Lionel in 1967. Lionel still makes American Flyer S-gauge today.
Our many thanks to Stan Koci for donating this layout.