Keystone Watch Case ad

A Watch Case Wears

at point of contact with the hand or pocket. A solid gold case wears thin and weak and a cheap filled case wears shabby. A Jas. Boss Stiffened Gold Case is guaranteed to wear for 25 years. It is made of two layers of solid gold with a layer of stiffening metal between, all welded together in one solid sheet. The outside gold will last a quarter of a century and the stiffening metal will keep the case strong as long as you wear it. This is why thousands wear the

JAS. BOSS Stiffened GOLD

Watch Case

on costly works in preference to a solid gold case. Ask your jeweler to show you a Jas. Boss Case and look for the Keystone trade-mark stamped inside. Send for Booklet.

THE KEYSTONE WATCH CASE COMPANY, Philadelphia, Pa.