Owens' early bottles were often cruder than their hand blown hand tooled counterparts.
The user is now directed to move to Question 4 - the first question in the section of the key that deals with the dating of mouth-blown bottles.
Air venting marks can be a very useful dating tool for bottles manufactured during the late 19th century.
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Description: Click for additional information. Antique Bottle Types These are a combination of top types, and design features that allow for quick field classification.