Age dating ball perfect mason jars

30-Sep-2017 20:58

The blackglass units are attributed to the Hemingray Glass Company, well-known for their electrical insulators.Some MASON’S PATENT NOV 30th 1858-type jars are marked with a “Maltese Cross” symbol (which indicates the Hero Glass Works / Hero Fruit Jar Company, of Philadelphia, PA) either above or below the word MASON’S.I have seen, however, just recently (2013) even rather ordinary-looking aqua or greenish-aqua 1858 jars for sale at flea markets that are, in fact, new, and were probably imported from China!

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A notable successor of this type of jar, the (with dozens of minor variations in size, shape and color; please see the “Ball Perfect Mason” page), would easily become the most popular and commonly produced fruit jar of the 20th century in the US, and is seen in proliferation at antique stores and flea markets around the United States.

The “whittled” look might be compared to the appearance of heavy rain beating against a glass windowpane, and is caused by the molten glass having been blown into a mold that was not properly pre-heated — that is, the glass had begun to solidify too quickly. The jar pictured here is an example.) Mason’s Patent Nov 30th 1858 jar " data-medium-file="https:// data-large-file="https:// class="alignleft size-large wp-image-1083" title="Masons-Patent-Nov-30th-1858" src=" alt="Mason's Patent Nov 30th 1858 jar" width="520" height="1024" srcset="https:// https:// https:// sizes="(max-width: 520px) 100vw, 520px" / However, vast quantities were produced by well over 100 different glass factories, and many of those have NO identification marks whatsover, or only a mold number, letter, or emblem on the base.

Contrary to a popular misconception, these jars were not made in wooden molds, but in metal molds, usually made of cast iron or steel. In those cases it is difficult, if not virtually impossible, to positively identify the actual glassmaker.

On most examples, the letters “H”, “F”, “J” and “Co” can be faintly seen within each “arm” of the cross. This style with the cross underneath the word MASON’S is listed as jar#1939 in the “RED BOOK” of antique and collectible fruit jars often consulted by collectors.

There are other slightly different variants of that jar (this is just one example)!

Typically, the base of these jars are marked with “PAT NOV 26 67” (Patented November 26, 1867). In general, any jar with the PAT NOV 26 67 marking on the base can be attributed to the Hero Fruit Jar Company.

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