Mason Jar Identification, Dating & Value Guide

What you receive

Identify common Ball, Kerr, Atlas and Mason-style fruit jars with a 29-page collector reference. Compare approximate logo eras, closures, rims, base marks, colors and condition, then research value using linked sold examples. Instant PDF download; no physical item ships. WHAT'S INSIDE 23 chapters covering a four-step identification flow, an eight-era Ball logo timeline, Mason's 1858 patent inscription, Atlas and Hazel-Atlas marks, Kerr closures and basemarks, other makers, lid and closure schematics, ground rims and machine-made features, colors, sizes, damage, reproductions, modern commemoratives and altered glass. TRACEABLE VALUE RESEARCH Eight named auction observations link to their original records. The guide distinguishes single jars, mixed lots, included contents and buyer premiums. Worked arithmetic shows why a hammer price, buyer total and seller proceeds differ. These examples demonstrate a comparison method; they are not universal value ranges or an appraisal of your jar. CAREFUL DATING AND AUTHENTICITY A patent date is not a manufacture year. A typical vintage Ball mold number, including 13, does not date the jar. Rim texture, base wear, unusual color and an Owens scar are supporting clues, not standalone authentication tests. Approximate dates and unresolved identifications are stated as such. RESEARCH YOU CAN FOLLOW Clickable contents and 23 chapter bookmarks support navigation. Linked references include Minnetrista, the SHA/BLM historic-bottle research, specialist glass-mark studies and a manufacturer announcement for modern Ball Heritage jars. The glossary, research routine, condition vocabulary, selling tips, methodology and limitations help you keep useful identification records. YOU RECEIVE One 29-page PDF, US Letter size, printable and readable in a PDF viewer with zoom. 2026 Edition, revision b1 dated 6 October 2026. Personal and in-business use for your own inventory and staff training; redistribution is not permitted. Independent publication by LintHead Restorations / MercantileDesk. Brand names identify jars only. No affiliation with or endorsement by Ball Corporation, Newell Brands or any jar manufacturer. General collector reference; not authentication, an appraisal or a guarantee of age, rarity or sale price. No food-preservation instructions are included. You will get a PDF *(228KB)* file