Just found this at the local flea mkt... looks kinda' primitive, flat about 7/32 thick, stamped "Willys- Overland" sizes ... 5/8 " and 15/16" (strange)
The Willys - Overland plant was in Toledo. Now demolished except for the old brick boiler house chimney that still stands as a landmark, it's still embaazoned with the word "Overland" and can be seen as you pass by on I-75, I wonder how many "kids" have any idea of the history of that old factory site.
Joe B