A little hard to see from this I-Phone picture, but I am pointing to the actual contact! It was I imagine silver soldered??? to the bimetal plate, and because it appears to have had a high resistance joint melted the solder and fell off! I found it right where you see, jamming breaker opened. I put a dab of JB KWIK weld to hold it so I can play show and tell without loosing it.
Y8-12-09