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Then with a twisting motion, the top was uniformly shaped.Bottles produced during the last twenty years of the last century will show evidence of this twisting motion which left faint concentric rings around the mouth and upper part of the neck.

A hot piece of glass was applied to the neck and then hand tooled to the proper shape.When the mold seam stops before the top of the bottle then the bottle is said to have been hand finished..Looking at the base of a bottle is also helpful in determining the age.Peterson has a Bachelor of Arts from Eastern New Mexico University and a Master of Arts from the University of Nebraska, both in anthropology, as well as a Bachelor of Arts in history from Columbia College.Beginning collectors often wonder how to tell the age of a particular bottle.

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