The Keystone Watch Case Company

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.

-Original-

i # ■ A Watch V-í Case Wears ffrn, n ,'?MKEíÍt mi''.' atpointofcontactwiththehandorpocket. íWWIWWBb. V 'iMÊÊSS&é'ffml' A solid gold case wears thlu and weak 7, iJÍS2ftafi!Bí=s'9K?5Kand a cueap filled case wears shabby. ' 'i '! 'jM MÊmBÊC -3SSW A Jas. Bos Stiffened Oold Case ig "'SHHm'Í'V-1'"""'"', 'i-.vvfek guaranteed to wear ibr 25 years. It Ís lHyKt;: „ V,:' l[ ■Mt$!$Ki madoof two layersof aolld gold with HS-í"'': ■7'''í'''ÍÍÍ?!??!-alayerof BtiOenlng metal between, all Sto':' % I' míi5Píí"' welded together Ín one polid Bheet. ÊIÊK' i II 'úmr The out8lde gold wijl last a quarter oí P í) " f $%!)&. acentury and the stiffening metal will eflSï w keep the case stronK as long aa you wer wUfiW "' lt. Ibis is wby tliousands wear the Mi 9 ÊSU99 GOLD fSïL Watch Case T0jF on contly works Ín preference to a Bolid gold case. Ask ycur ieweler to show you a Jas. Boas Case and look for the m J Keystone trade-mark Btumped inside. Srnd tor Booklet. PhiUdelphia, Pa.