Question: Do old glass bottles have seams?

YES - The bottle has embossing or visible vertical side mold seams somewhere on the body between the heel and the base of the finish or lip. A bottle may have mold seams but no embossing, but all embossed bottles were molded in some way and have mold seams even if they are not readily apparent.

How can you tell if blue glass is valuable?

1:142:00How To Identify Valuable Glass by Dr. Lori - YouTubeYouTube

How do I know if my glass bottles are worth money?

The Age of the Bottle While not all old bottles are valuable, an older bottle is more likely to be worth more than a newer one. Seams and pontil marks are two of the ways you can determine a bottles age. The pontil mark is the mark at the bottom of the bottle where it was attached to the glass blowers pontil rod.

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