This stem from an electronic Benrus HG13 (ESA 9154) is broken. Is is possible to solder it and have it not easily break again? I have zero experience soldering but do own a soldering gun so if it will work I would give it a try, I just don't know what I'm doing when it comes to soldering 🙂

You should have a movement ring like this 

Nop, the eccentric You need is where the red arrow points. Hopefully it will move.

Hello and welcome from Leeds, England. 

I'm fixing up another Landeron 48 - this will be my 4th one of these so I'm getting the hang of these a bit. I got it as a non-runner (pallet fork pivot broken, barrel tooth broken) and replaced those so that it runs ok.    Reassembling the chronograph I've hit a snag. The watch stops when the chrono is engaged. I think the teeth are too deep. I think the eccentric to adjust that is on the hammer, circled in the picture. It won't move. Any suggestions?