I need help with this pocket watch that belonged to a great grand father. I want to know the name of the watchmaker, the age of the watch and any other information I can get on it! Will really appreciate any help as I am in India and its really difficult to get good professional help on such watches here.. Some info on it- the dial says- "inflexible lever" and "swiss made" on it. The inside of the watch has 3 readable engravings- "Advance/retard", "swiss made" and "+35344". I am guessing the +35344 is the swiss patent number. I did try to search the net on this number but could not get any results. Photos are attached..