What do the numbers on the bottom of blue mason jars mean?
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 ball perfect 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.
How do you identify Ball Mason jars?
The logo imprinted on each jar is, by far, the easiest and fastest way to determine the approximate age your Ball mason jar….Rare Finds
- Logo Imperfections. One of the most common imperfections are misspelled words in the logo.
- Upside Down Jars.
- Jars With Original Lids.
What Ball Mason jars are worth money?
The most valuable mason jars are:
- Van Vliet Improved Jar – $23,500.
- Black Amber Magic Star Fruit Jar – $3,000.
- 1933 Ball Upside Down Error Jar – $1,000. There are two types of Ball upside-down Mason jars.
- The 1870 Chief Mason Jar – $800. (Photo: gregspurgeon.com)
- 1858 Willoughby Stopple Jar – $500. (Photo: hoosierjar.com)
What Mason jars are collectible?
What Mason jars are the most valuable?
How do you date Mason jars?
Some helpful notes to keep in mind:
- Not every jar has their manufacture date on the glass, but most have the patent date.
- There will be a large number on the bottom of your jar.
- These charts tell you the approximate decade in which your Ball jar was made.
Why are some 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. Those blue jars are not rare.