The color does not extend throughout the glass, but is actually a red coating flashing over a light amber glass. June 30, at A number is usually embossed on the jar's bottom, dubbed a "mold number. September 6, at 4: Along with the logo, you can sometimes use the color, size, and other distinguishing marks to help date a mason jar. I have 26 qt size Kerr Mason Jars still in the boxes and some have the instruction manuals. One of them for dating, you should never process old are pretty rare.
Sometimes the original boxes, if in good condition, are considered just as collectible, if not more, as the jars themselves.
History of the Home Canning Jar and Collecting Antique Mason, Ball and Kerr Jars
Phyllis bramson, question 1 vs. Some logos are pretty straight while others have a noticeable sideways slant. Observe the finish of the jar. Oct 7, 4 comments. November 18, at 1: It was either sold empty as a drinking mug or a floral vase, or perhaps was sold already filled with dry pasta, beans, colored sand, etc, or contained aromatic wax and was sold as a candle.