N/A MASON'S PATENT NOV.30TH 1858 keystone JAR

The product is a vintage Mason's patent canning jar from November 30, 1858, featuring a unique keystone design. This quart-sized jar is made of aqua glass and bears the California Prop 65 warning from the Masons Consolidated Fruit Jar Company. Originating from the United States, this antique jar is a collectible item for those interested in bottles and insulators from the pre-1900 era.