I know this is common knowledge to many, however, the 1915-17 double stack oval magneto ring came in 3 styles. The differences are in the reinforcing flange circling the inner diameter area. The first style has no reinforcing flange; the second has two half moons; and the third has a complete circle reinforcement. I picked up an early type at Chickasha and thought I’d display my collection (stash) to show the differences.
Rich C.
Thanks Rich!