The Dietz Lanterns were first introduced in 1900, and has been produced in at least seven distinct variations continuously over the past 108 years. The first and oldest style Monarch had a flat top tank, un-reinforced air tubes, and a 9/16" fuel cap. The Junior is a similar version on the famous Monarch.

The Dietz Junior was introduced around 1898, and is quite possibly the most often 'copied' lantern of all time. Its compact size and light giving ability has made it a favorite for over 100 years. The oldest version of the Junior was made with an outside globe lift, a 9/16" fuel cap, no reinforcement beads in the air tubes, and a soldered in tank bottom. The tank construction was quickly changed to the more reliable 'double crimp' style that is still in use today. Around 1912 the globe lift was moved to the inside of the air tube. Since 1916, the Junior has been made with both vertical and horizontal beads in the air tubes.