Glass canning jar, Kerr 'Self Sealing' Mason jar

Kerr Glass Manufacturing Corporation began producing self-sealing Mason jars in the early 1900s, revolutionizing home food preservation. The 'Self Sealing' design featured a two-piece lid system that created an airtight seal, making home canning safer and more reliable. These jars became household staples throughout the 20th century, particularly during wartime when home food preservation was essential. Kerr Mason jars are highly collectible among vintage kitchenware enthusiasts, antique bottle collectors, and those interested in farmhouse décor and sustainable living. Collectors value these jars for their historical significance in American domestic life, their varied embossing styles and colors, and their continued functionality. The jars appeal to both serious collectors who seek rare variations and casual enthusiasts who appreciate their nostalgic charm and practical use in modern kitchens and craft projects.