NOTE:  I am a watch enthusiast, but not an expert by any means.  I am happy to answer any and all questions, and am describing the watch movement as well as I can.

Waltham P.S. BARTLETT 16S 17 Jewel 3/4 Plate Pocket Watch Movement w/white enamel dial and blue steel hands, Grade No.635, Model 1908. Approximate production date 1910. 

As found condition, balance wheel loose, spring may be shot, missing seconds hand, nice dial