This is a
Hampden, 0 size, 13 jewels, Diadem model, made about 1908.
Here are the train bridges. Note that the fingered bridges for the 4th and escape wheels are really one part, much like
Elgin's bridge grades.
This was a "touchy" watch. Although the movement ran well, I had ongoing trouble with it while running it for several days to test the rate. Finally I narrowed it down to the case screws. Sometimes, the case screws can pull the plates, or some other part a little and cause a problem. They don't even have to be all that tight. I ended up filing just a hair away from the inside lip on the case in a specific spot. Problem solved.
For the most part, American watch companies did not make watch cases. The cases were purchased separately by the original buyer at retail. So, although the degree of standardization is remarkable, the cases are not always perfect fits to the watch movement.
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