I have a pocket watch made by E. Mathey and I don't know much about it, so if anyone can provide info about it, I would be grateful. It is 14k gold and the basic functions and stop watch work well, but the repeater function seems to be jammed. I would like to get it repaired, but I'm a little skittish about letting just any watch repair service try to repair this. Any suggestions regarding what I should look for in a watch repair service so that it's done right? Thanks so much.