I have what i believe to be an old sauce bottle, it is fairly crude with bubbles all throughout the glass in the base,the middle,up the neck and even in the lip. It also has a small circular mark on the base that i cant tell if it is a fire pished pontil scar or a suction scar from a machine.my concern is: is this an authentic bottle? Is this some kind of decorative bubble glass? Has anyone seen this before?