These Ball Perfect Blue Mason Vintage jars are over a century of age. The large jar is thought to have been manufactured from 1910 to 1923, and the smaller jar from 1923 to 1933. To verify their age, view the logo diagram provided. The number on the bottom is the number of the mold used to make the jar. This set of blue tint jars comes with original Ball Jar Zinc lids and is offered at a package price of $14.97. Get your hands on this set of vintage jars and add a touch of nostalgia to your home. Makes a great set. Great for holding change, Canning, Decor. ect