The glass canning jar lid is marked “Imperial Gem Made in Canada

This beautiful jar was produced from the late 1920's through the 1930's in Canada. In fact, Gem Jars were only ever manufactured in Canada. , Our

Improved Gem 1930s Gem Mouth Quart

Antique Mason Jars: How to Date & Identify

Mom's Cafe Home Cooking: Canadian Made Improved Gem Jars for Home

6 Vintage Improved Gem Glass Canning Jars clear lids 1 pt 1900's

Improved Jar & Improved Crowns

Hazel Atlas Barrel Pantry Jar with Wire Handle - Ruby Lane

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Mason's Patent Nov 30th 1858 fruit jars - General Overview

Reproduction juicers - JuicerCollector

Improved Jar & Improved Crowns

5 Vintage Improved Corona Clear Quart canning jars. One with glass lid. Made in Canada , Very clean collection of Improved Corona jars with zinc

5 Vintage Improved Corona Quart canning jars. One with glass lid. Made in Canada

Glass Manufacturers' Marks on Bottles ~ Page One