What is the date Old royal cup coffee brand square glass jar-one pound net?

According to the current manager of production, the company was started as Batterton Coffee (England) in 1896, and sold beans in glass jars, and became Royal Cup in 1950, and continued to sell in glass jars for a few more years. A jar marked Royal Cup is, therefore, not antique, but some glass coffee jars are anatique. Old jars without chips or scratches are collectible, especially when they have the original lid, and sell from $7 to $45 on ebay and other on-line venues.