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bullgill

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Jun 8, 2014
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bullgill

bullgill

Full Member
Jun 8, 2014
165
169
Primary Interest:
All Treasure Hunting
Does anybody know what manufacturing process leaves these concentric rings? I know what a pontil looks like and I know what a seam looks like, I cantell you what blown in a mold is but I have no clue what makes these rings and why there are no seams.
 

bottles10

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May 2, 2007
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I BELIVE IT IS WHERE THE AIR EXCAPES THE MOLD, you FIND THEM ON A LOT OF OLD MILK BOTTLES.
 

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