Wow. Amazing work... This is needed.for a lot of top rollers and early idler wheels
Patrick. All rubber on original machines where black. Some do have over spray. But that's it.
The true difference in boogie wheels.
Is as follows.
1943. BF Goodrich is placed on the inside of the wheel. Not visible from the outside at all.
1944. BF Goodrich is now on facing the outside and a red circle is used
1945 still on the outside now using a red rounded rectangle.
Some 45 examples can be found with red circle
Post war monarch makes boogie wheels