Zero – The bottle is either not cylindrical, or if so, is very crudely made and non-symmetrical exhibiting no concentric body/neck rings. This bottle is mouth-blown and likely either free-blown or dip molded. These two manufacturing types can be hard to differentiate from each other, though free-blown bottles are usually cylindrical or oval in cross-section and have lines that are not sharp (i.e., a “flowing” look). Most free-blown bottle date prior to the 1850s though can be much older as this method was used at least as early as Roman times. Dip mold produced bottles are either cylindrical, square or rectangular in the body but usually have more distinct lines from the lower shoulder down since most if not all of the body was actually molded (Jones & Sullivan 1989). Dip mold bottles usually date prior to 1865-1870 but can also be much older (back to early 18th century at least).

A user may move to Concern #4 for one additional dating attribute based on pontil scars, though all these datable attributes (free-blown, dip mold, and pontil scars) overlap significantly. Consult Bottle Body Characteristics & Mold Seams page for more information on and images of these type bottles.

Note: The change/paste mildew and mold, free-blown, and you may dip designed bottles also are lips-blown or handmade container, which is secure on the Mouth-blown package matchmaking web page (hook up less than).

Appearing This website: To do a word/phrase or image search of this website one must use the following Google search link: Search the SHA/BLM Historic Glass Bottle Identification & Information Website (Note: Search results for this website will be just below the final top-of-the-page Google paid ads.)

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