# Dating bottles by their tops and bases

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Produced during the era where all bottles were an relatively rare and cherished. BOTTLE LIP STYLES PHOTO DESCRIPTION PERIOD COMMONLY SEEN - - - sheared top with applied ring wine or ale black glass or dark amber 1720s - 1800s sheared top with applied lip wine 1740s - 1800s sheared top tooled common to snuff bottles and food bottles 1800s -1850s sheared lip bottle cut from blow pipe fire polished smooth common on hand blown flasks 1700s - 1860s inward rolled lip glass folded inward, crude, uneven 1700s - 1870s outward rolled lip glass folded out and down, crude, uneven 1700s - 1870s applied tapered lip crude shape and drippy bottom seam stops below lip common on early medicines 1830s-1870s applied single collar lip hand formed, crude, drippy bottom 1850s-1870s applied blob top seam ends below lip, crude shape common on sodas, beers, and mineral waters 1840s -1880s gravitating stopper patented by John Matthews New York Oct 11 1864 found on soda bottles 1865 - 1880s codd bottle patented in 1872 uses a marble and rubber stopper to seal mostly used in Great Britain image supplied by Harry Pristis 1873 - 1910s Baltimore loop looks like blob top on outside inside of mouth has an ring shaped depression seam ends below lip used on beer and soda bottles 1885 - 1900s Hutchinson stopper seam stops at lip found on Hutchinson type sodas used a spring loaded wire and rubber seal 1879 - 1910s tooled tapered lip with collar seam stops below lip top formed with a tool that had profile of lip common on whisky bottles 1880s - 1910s flat applied lip seam runs up and under the applied lip glass but is sometimes obscured during the application often have drippy bottom later versions are more uniform common on patent medicines a small separation seam can be felt inside neck where dissimilar glass was added 1840s - 1880s sheared top with tooled ring lip fire polished seam stops below lip common on wines and flasks image supplied by Harry Pristis 1850s - 1890s burst top no finished lip bottle broken off blow pipe, rough and sharp often mistaken for a sheared top or a broken bottle most common on English Victorian inks 1860s - 1900 Flat Tooled uniform shape, no drippy bottom seam stops part way up neck circular tool marks often seen around neck inside of neck is smooth 1880s-1910s Tooled Ring uniform shape, no drippy bottom seam stops part way up neck circular tool marks often seen around neck 1890s-1910s tooled tapered lip uniform shape, no drippy bottom seam stops part way up neck common on medicines 1880s - 1910s early threaded cap bottle used a screw cap probably zinc a neck ring and threads were part of the mold the seam stops just above the threads the top was sheared and fire polished common on early catsup, sauce, and food bottles 1880s - 1910s tooled crown top patented in 1892 by W. Squirt bottle with script logo.\
&#x20;![dating bottles by their tops and bases](https://sha.org/bottle/missionbottle.jpg)\\

The chart accompanying this statement notes that bottles made before 1860 have a side mold seam ending on the for or low on the neck, between 1860 and 1880 the seam ends just below the finish, between 1880 and 1900 the seam ends within the finish just below the finish rim top lip surfaceand those made after 1900 have mold seams ending right at the top surface of the print, i. How did people dispose of them. Or they had a leftover bunch of glass from the night before or earlier in the day and they end up starting another run of bottles for some other customer with the old glass. This site is mainly about Note or Old Bottles. The dating guidelines found on these Dating Pages and the entire website do not always work well with what the author calls click for more information. The image shows the vertical side mold seam ending on the outside edge of the bead finish at a the glad portion of a induced horizontal mold seam that encircles the extreme outer edge of the finish. The ultimate cruise resource: cruise reviews, deals, news and advice?.

If you are interested in identifying what a bottle was likely used for - i. Leave a Comment or Ask a Question If you want to identify an item, try posting it in. All truely hand blown bottles have an applied lip. With each chart the reader will find.\
&#x20;![dating bottles by their tops and bases](https://sha.org/bottle/Bases/freeblownbottles.jpg)\\

**Antique Bottle Bottoms (Bases)** - Most bottles with embossed lettering date from the late 1.\
&#x20;![dating bottles by their tops and bases](http://www.sha.org/bottle/Typing/soda/pepsicola.jpg)\\

It was found that by blowing the molten glass into prepackaged molds greatly simplified the process. However, the technology to mass-produce the whole bottle did not appear at once. It came in small steps. At first molds could only be used to create the lower parts of the bottle. The neck and lid would then have to be done just as in the old days by hand. But as time when on and the molding technology would increase and allow for this. The figures, below give a timeline for these changes. Antique collectors can also use these seams as a dating technique for their bottles. THE SEAM METHOD - OF DATING OF GLASS BOTTLES At one time almost all bottles were completely hand blown in the open air without the aid of molds of any kind. Such work required skilled craftsmen and a great deal of manufacturing time. Small wonder then that in many cases the bottle was more than half the cost of the product. Fortunately by the 1860's, or around the time of the American Civil War, glass technology had progressed enough to allow manufactures to make extensive use of molds. This greatly simplified the process of bottle making, as well as the amount of time it took to manufacture each one. Instead of making each part by hand, the mold allowed a worker to simply insert a hollow pipe or reed with a glob of molten glass into the mold and literally inject the glass against the mold. However, mold technology did not spring up all at once -- it evolved over a period of time. At first, only the lower parts of the bottle could be injection molded, the rest still had to be hand made or blown. However, as time went on, more and more of the bottle was injection-molded and less and less hand blown. With each increment the seam kept going up and up. I have found the reliability of this method of dating to be almost absolute. While it is always possible that some manufactures could have kept and used some of their old molds well past their technical life, for the most part, they were jumping over themselves, trying to obtain the latest and most economical means of production. No matter how snug or tight the fit between the two sections and in some cases three of the mold, there's always a rough edge where they make contact--thus creating a seam. It should be remembered that glass manufactures were always interested in, and kept an eye out for, new ways to increase productivity. Due to the inexpensiveness of molds and the equipment they required, as soon as a new technique was created it was quickly copied by the rest of the industry. It was a simple matter of staying economically competitive.
