Bottle dating machine
The disk-like mark is sometimes confused with a pontil.
the pontil is actually broken glass where the metal rod used to hold the bottle while the lip was form was broken off leaving a sharp scar.
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.
the bottle on the right appears to have a tapered collar a form which was very popular for more than 60 prior to the making of this bottle.
This is the base of the bottle whose lip is shown above left.
The Owens ring again covers the entire base and even intrudes out to the side of the bottle slightly.
The pictures below are from two early machine made medicine bottles.
the right side is crude and was disturbed by the action of marking the marking with Owens Ring.