Back further in your posts your were asking about slingshots. I have borrowed your pics.
The kicker on the left is classic Stern used in some sort of ball launcher. I cannot remember which pin, though. The one on the right is the classic Stern slingshot kicker. I have learned recently that the washer is a blueprint item. I think it is supposed to keep the spring going cockeyed on the plunger link.
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You have replaced those Stern units with the Bally/Williams/ Data East style of kicker. I think you may have used your original Stern pivot mounts. Although, it is hard to see for sure in the pic.
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If you have not already done so, you might want to upgrade your pivot brackets with these from Pinball Life. I have used these to replace some worn out units on my Sterns and they work fine. But the geometry is a little different and you must relocated one attaching screw (no exceptions).
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https://www.pinballlife.com/williamsbally-slingshot-kicker-mounting-bracket.html
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