These Fire King mugs were produced from the 1940s until somewhere in the 1980s by the Anchor Hocking company - the brand you can see marked on the bottom of the mugs. This very durable line of dish-ware was originally produced for everyday use and was often sold in bags of flour as promotional items in it's beginning stages.
The dish line used many different patterns throughout it's production life, one being the gradient and luster version of the Kimberly pattern. This design was inspired by diamond mines in Africa mimicking a raw diamond ore - and hey, we sure like the sight of these diamonds!
