![Keystone Tot Railroad Model #666](http://www.collectingkeystone.com/wp-content/uploads/2013/12/IMG_0552-150x150.jpg)
All I Know for sure about this set is it was produced after 1953 when Keystone split into several divisions. I am sure that this set is incomplete but there is not an instruction sheet with it and I have not found it in any Keystone literature. The box contains pieces of plastic track and two wooden trains.
From my private collection.