With the Y-shaped stanchions. As you can see, this one is the earlier version with the Y Shaped stanchions. This O gauge three rail electric 0-4-0 engine is from BEFORE World War 2. This number was produced 1917-1927, but I think this one dates to 1918.
Item Tag: S type electric outline
Built during the formative years of Lionel production, these compact 0-4-0 engines were designed for dependable operation and rugged play value. Item Type: Prewar Electric Locomotive. Production Era: Prewar Lionel era (1920s–1930s).