the two crossed keys mark on your pocket-watch look like the sponsor's mark -
C.F. KEES & Co. (later ARCHIBALD, KLEMENT Co.) Mostly used on Sterling Silver & Gold Accessories & Novelties, Newark, NJ, USA from 1901 - 1909.
Please note for future reference, due to the volume of hallmark queries we are now receiving, unfortunately we are no longer able to provide free opinions on watch marks.
However, we have arranged with experts in the watch department field to provide expert watch opinions for $9.70 (no valuation included) alternatively an Expert Watch Valuation at $19.70. (appraisal which includes valuation).