Looks like possible pontill mark? Almost looks like it could have been polished. Has extremely light staining and minor wear. Please see pictures for more on the condition of this bottle. The item "Civil War Era Blue J.
PA bottle antique" is in sale since Friday, October 30, 2020. This item is in the category "Collectibles\Bottles & Insulators\Bottles\Antique (Pre-1900)\Sodas". The seller is "alereme0" and is located in Onalaska, Wisconsin.
This item can be shipped to United States.