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Other colors that are known, but not so easily found, include cornflower blue, straw yellow, olive green, olive amber, blackish olive, dark yellow amber, light green and medium green.Some of these colors might be known under other/different names depending on who is describing them!Hundreds of millions (probably upwards of a billion or more!) have been made and used by home canners throughout most of the 20th century.Some jars have embossing that is unusually faint ( for instance, just one or two letters within a word) and this can sometimes be due to accumulated debris partially filling the engraving of the lettering on the mold itself at the time of making, or perhaps some other reason.
See this chart (courtesy Minnetrista.net) showing logo variants at the following link.As can be readily discovered, there were many different “sets” of molds used over a period of many years, with this same series of (up to) 16 numbers used over and over again to identify the molds being used on a particular machine.Thus, if a random sampling of these jars are studied, (for instance, just looking at a selection of only those marked with a number “2” on the bottom) , it may be seen that the numbers typically appears slightly different, in fact “unique” in it’s exact formation, from one jar to the next.Ball Perfect Mason – Half Gallon & Quart sizes " data-medium-file="https:// data-large-file="https:// class="wp-image-1339 size-large" title="Ball Perfect Mason jars" src="https:// alt="Ball Perfect Mason Jars- Half Gallon & Quart sizes" width="640" height="629" srcset="https:// https:// https:// sizes="(max-width: 640px) 100vw, 640px" / Most of the earlier versions were round (cylindrical) in shape, and some of the later types are square (with rounded corners) in design.Some variants have vertical “ribs” or “grips” along the sides, added to assist in handling the jars while they are wet.
) if you are “into” studying fine differences in these jars ….