The Keystone Watch Case Company

The Sign of a Watch Case

This Keystone is the identifying sign of the best watch case made-no matter what it costs.  It stands for worth and wear-for beauty equal to an all-gold case, at a much smaller price. The

JAS.BOSS

Stifened GOLD

Watch Case

is better protection than a solid gold case, because of its stiffness and strength.  Better than any other case, because it will last for 25 years without wearing thin or losing its beauty. A reputation of 50 years proves the value of the Jas. Boss Case.

Consult the jeweler.  Write us for a booklet.

THE KEYSTONE WATCH CASE COMPANY,
Philadelphia.