Please see the photo. The long bolt is a WB1C and I have no reason to think it's not right. However, the short on e on the left is the one that I have more questions about. It has a circular depression in the middle, with an M in the center. There are three 'dots' around the perimeter. Thoughts?
2021-12-10 12.51.17-1.jpg
Short bolt.jpg
2021-12-10 12.51.17-1.jpg
Short bolt.jpg
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