Dating antique glass bottles
If the bottle looks perfectly clean with impeccable design and the glass contains no discoloration, such as an iridescent sheen, it is likely a reproduction.
Ball jars are classic vintage pieces that add so much to any room.
Since its initial posting in early 2005, the Historic Bottle Website has become a very useful resource to the historical archaeology community.
This makes its location on the SHA website in the new "Research Resources" section particularly appropriate.
So, that begs the question: When was your Ball jar made?
To answer that, compare the logo of your jar to those on this chart: You can also use other identifying marks to help date your jar.