PlaneDiggerCam
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Usually screw tops before 1900 were ground lip.I seem to noticed after all my years of digging that screw tops seem to start being seen/used around 1920 on medicine/pharmacy/druggist bottles ect, ect. but have seen them on Kecthups around turn of the century 1900, maybe even 1890's & pretty sure some other bottles had them pre 1890 but I've never seen anybody anywhere exactly answer that question.