Good evening group;
I recently purchase a 18s ASP pocket watch, gold filled. it ran great for a few weeks and has stopped running. i have not taken the watch apart yet to see what it might be. however when i removed the back i noticed that the balance wheel has great amplitude. The hair spring is in great condition. it appears to go faster and suddenly freezes (stops) dead. it does not slow down than stops but suddenly freezes. when touched, it will run than freeze. any thing that i might look for when i break it down?
thanking all in advance
Jerry