This is my second pocket watch restoration, an Elgin size 12, open-faced grade 303. This watch is very slim and would be great for work because I can leave it out on the podium while I make presentations to keep track of time.
Shown here is the front and back of the movement prior to cleaning and oiling. Also shown are all of the parts after cleaning.
When a pocket watch is disassembled it looks extremely complicated but if you take numerous photographs as you take it apart then re-assembly is possible.