Knox Mason Jar Value Guide

The Knox Mason Jar is a quintessential piece of American kitchen history produced by the Knox Glass Bottle Company between 1920 and 1940. These jars are highly collectible due to their distinct keystone logo and their representation of the widespread home canning movement in early 20th-century households.

What Is Knox Mason Jar Worth?

The typical price range for Knox Mason Jar is $15 - $20 based on recent sales. However, values can vary depending on the item's condition, rarity, and other factors such as:

• Condition of the glass, specifically the absence of chips or 'flea bites' around the rim.
• Clarity of the embossing, as sharper 'K' logos and lettering command higher prices.
• Presence of original matching lids or hardware which can increase the $15-$20 base value.
• Overall glass clarity, with a lack of cloudiness or 'sick glass' being preferred by collectors.

How to Identify Knox Mason Jar?

• Look for the words 'KNOX' and 'MASON' embossed clearly on the front of the glass.
• Identify the signature keystone-shaped logo containing a capital 'K' inside.
• Check for the authentic clear glass material typical of the 1920-1940 production period.
• Verify the presence of standard threading at the top designed for zinc or glass canning lids.

History of Knox Mason Jar

Knox Glass Bottle Company was a prominent American glass manufacturer. They produced a variety of glass products, including these iconic canning jars. The keystone logo with a 'K' is a distinguishing mark, popular during a period when home canning was a widespread practice in American households.