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is stamped in the best watch cases made. It is the trade mark of the Keystone Watch Case Company, of Philadelphia, the oldest, largest and bestknown factory in the world - 1500 employees, capacity 2000 cases daily. lts products are sold by all jewelers. It makes the celebrated Jas. Boss Filled Watch Cases, now fitted with the only bow (ring) which cannot be pulled off the case - the Askyourjewelerforpamphlet.