![]() ![]() In most cases, one- or two-digit numbers are actually mold numbers that indicate the specific bottle mold or section in an automatic bottle machine. ![]() What do the numbers on the bottom of glass mean? in Knox, PA The pints and quarts are worth about $6. The Knox jars were made in the 1940s by the Knox Glass Bottle Co. They are lighter than actual mason canning jars, although the seals and rings for mason jars will fit on them. The jars being stamped Mason Atlas has more to do with marketing than anything else. However, the jars Classico uses are not actual mason jars and were NOT intended for home canning. Typically, the smaller or more common antique jars can go for about $20 apiece, but the more rare versions can sell for as much as $300. Since then, Atlas jars have been made by a different company and are used to package Classico pasta sauces. The cheapest is the Self-sealing jar by Kerr at $40 (you'll get half-price for a lost lid.)Īuthentic Atlas mason jars were mason jars made by the Hazel-Atlas Glass Company, which was in business from 1902 to 1964. The 1881 Van Vliet is the most expensive brand ever sold at $23,50o, with a starting bid of $1,000. It's valued at about $1,000.Ĭollectors covet Mason jars, especially the rare ones. According to Country Living, an upside-down Ball canning jar designed to rest on its lid is relatively rare and made between 19. How much are Vintage Ball Mason jars worth?Īn antique Ball brand perfect Mason jar sold on eBay for about $80, likely because its deep olive green color is relatively rare. Glass makers needed to know if a particular mold was defective, so each one was assigned a number. In particular, the numbers often refer to the mold used to produce the bottle or jar. Every few years, the Ball Manufacturing Co changed the logo and if you compare yours to a reliable chart, you know how old it is. If you have a Ball jar, you can date most of them just by looking at the logo. ![]() Rather, the mold number tells you where the jar was positioned on the glass-making machine that was used to produce it. Many Ball mason jars have a number printed on the bottom of the jar, but this is a mold number that does not indicate the year of production. What do the numbers mean on the bottom of Mason jars? ![]()
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