Hi, I am new here, and I have this mechanical pocket watch. When I open it up, it says E. Howard Watch co. (I am assuming this is the serial number.) 59511, then Boston USA. Then near the bottom it says: Pat'd 21, 3 pos. temp. 17J ( I think that means 17 jewels). But when I lay it on its back with the face up, it stops every minuet or 2. I have no idea what is wrong with it, can someone help? Thanks.