Your bottle dates to the earlier part of the 20th century.
The screw top immediately suggests machine made so post 1910/15, the valve mark on the base confirms an earlier 2oth century manufacture. There is also manganese in the glass which has caused the purple tint.
You can read a detailed account of dating clear bottles which contain manganese here - a well researched article
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The screw top immediately suggests machine made so post 1910/15, the valve mark on the base confirms an earlier 2oth century manufacture. There is also manganese in the glass which has caused the purple tint.
You can read a detailed account of dating clear bottles which contain manganese here - a well researched article
https://sha.org/bottle/pdffiles/TheColorPurpleLockhart2006.pdf