What do the numbers mean on the bottom of blue mason jars?

Some helpful notes to keep in mind:
There will be a large number on the bottom of your jar. This is the mold number, and unfortunately also has no relation to the manufacture date. These charts tell you the approximate decade in which your Ball jar was made.


What are the numbers on the bottom of blue mason jars?

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. Rather, the mold number tells you where the jar was positioned on the glass-making machine that was used to produce it.

How do you date a blue mason jar?

If you have a Ball jar, you can date most of them just by looking at the logo. 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.


What are the markings on a Mason jar?

Numbers and Dots on Glass Jars

In particular, the numbers often refer to the mold used to produce the bottle or jar. Glass makers needed to know if a particular mold was defective, so each one was assigned a number.

What are the most valuable Mason jars?

The most valuable mason jars are:
  1. Van Vliet Improved Jar – $23,500.
  2. Black Amber Magic Star Fruit Jar – $3,000. ...
  3. 1933 Ball Upside Down Error Jar – $1,000. There are two types of Ball upside-down Mason jars. ...
  4. The 1870 Chief Mason Jar – $800. (Photo: gregspurgeon.com) ...
  5. 1858 Willoughby Stopple Jar – $500. (Photo: hoosierjar.com) ...


How to Date Mason Old Mason Jars and win a $10 gift card Viewer Challenge!



What are old blue mason jars worth?

Nowadays, you can even buy a big flat of Mason jars for pretty cheap at your local craft or household goods store — but the older ones can fetch much higher prices. 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.

How can you tell how old a Ball Mason jar is?

Some helpful notes to keep in mind:
  1. Not every jar has their manufacture date on the glass, but most have the patent date. ...
  2. There will be a large number on the bottom of your jar. ...
  3. These charts tell you the approximate decade in which your Ball jar was made.


What is a ball perfect mason jar worth?

An antique Ball brand perfect Mason jar sold on eBay for about $80, likely because its deep olive green color is relatively rare. According to Country Living, an upside-down Ball canning jar designed to rest on its lid is relatively rare and made between 1900 and 1910. It's valued at about $1,000.

Are Atlas Mason jars worth anything?

Atlas mason jar values vary between $10 to around $60 depending on a number of factors including the age, color, and condition. The older amber-colored E-Z Seal Atlas mason jars, which were made around 1910, are among the more valuable.


How do you date old Atlas Mason jars?

Dating an Atlas Mason Jar
  1. Look for Mold Seams. Examine the jar to see if it has lines or mold seams from its construction. ...
  2. Check the Texture of the Glass. ...
  3. Note the Name. ...
  4. Examine the Jar's Condition. ...
  5. Check the Style. ...
  6. Consider the Color. ...
  7. Compare to Recent Sales Prices.


What is a perfect mason jar?

“BALL PERFECT MASON” fruit jars. The Ball Perfect Mason was a brand of glass fruit jar (canning jar) made by the Ball Bros. Glass Manufacturing Company. Ball Bros was based in Muncie, Indiana. (See “Ball Brothers Glass Manufacturing Company” page, for a brief summary of that glass company).

Do old Mason jars contain lead?

Vintage blue glass mason jar – the jar had no heavy metals but the vintage lid had 861 ppm lead and 1,537 ppm cadmium. Weck glass canning jars – 142ppm of lead.

How old are Knox Mason jars?

The Knox jars were made in the 1940s by the Knox Glass Bottle Co. in Knox, PA The pints and quarts are worth about $6.


How do you date a Kerr Mason jar?

CO” embossed on the bottom, and in general those jars probably date mostly from about 1904 to circa 1920. Other fruit jars made in later years include their “Self Sealing” Mason, which was made in huge numbers, in several sizes and a number of different types (embossing variations) including the “wide mouth” varieties.

How old are Golden Harvest mason jars?

A Golden Harvest pint / ½ litre jar, circa 2015. Golden Harvest jars first appeared on the market in 1975 being made by Glass Containers Corp. in Fullerton, California, under the name “Golden Harvest.” They were rounded-square in shape.

When were star mason jars made?

The Magic Star Fruit jar features a glass lid secured by iron clamps, another innovation in sealing. The side of the jar features an embossed star logo surrounded by text. It was patented in Pennsylvania in 1886 by Hermann Buchholz. It was later produced by Wm.

How old is an atlas jar?

The Hazel-Atlas Glass Company, famous for its depression glass, made the Atlas mason jars and operated from 1902 until 1964. The company had the Ball Brothers and Kerr as their major competitors, especially in the 1940s and 1950s. After that, other companies started producing the Atlas mason jars.


Why are old Mason jars blue?

Feeling Blue

Those blue mason jars were mass produced until 1937 using sand from around Lake Michigan. It was that sand that gave the glass its blue hue.

Are Classico jars real mason jars?

However, the jars Classico uses are not actual mason jars and were NOT intended for home canning. The jars being stamped Mason Atlas has more to do with marketing than anything else. They are lighter than actual mason canning jars, although the seals and rings for mason jars will fit on them.

How do you clean old Mason jars?

Cleaning Antique Glass Jars (Mason Jars)
  1. Step 1: Get a Cruddy Jar. ...
  2. Step 2: Wash by Hand With Soap and Water. ...
  3. Step 3: Gather Your Soaking Materials. ...
  4. Step 4: Soak Cruddy Areas for Approximately 1/2 Hour. ...
  5. Step 5: Pull Out That Scrub Brush One More Time.


How old are porcelain mason jar lids?

Lewis R. Boyd was issued a patent for his invention (patent #88,439) on March 30, 1869.


Why are Ball canning lids hard to find?

It's a shortage that is being chalked up, in part, to the COVID-19 pandemic. Marie Bregg of Mason Jar Merchant told Better Homes & Gardens that sales through her online shop in late August were up about 600% over any other month in 2020, and 90% of that has been canning lids.

Are old Mason jars safe to use?

Canning jars have a life expectancy of 10–13 years. After that, you will experience more breakage because of the wear and tear of normal use. Because of this, it is not recommended to use vintage or antique canning jars for food preservation.

When were zinc mason jar lids made?

Mason's patent was for the machine that cut tin into threads, making it easy to manufacture a jar with a reusable screw top lid. Mason's sealing mechanism — a glass container with a thread-molded top and a zinc lid with a rubber seal ring — was patented Nov. 30, 1858.

How old are Drey Mason jars?

Drey jars (pronounced dry) were made from about 1917 through the 1920s by the Schram Glass Mfg.
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