Judging by your video, your Paull's Regal is circa 1920. The original fill cap was bakelite plastic, a Paull's exclusive. The globe is what I call a Super Zero, made to evoke the look of the old zero globes but appearing only on aftermarket globes. These were most likely made in the 1930's to go with the retro depression lanterns being made at that time by Dietz and Embury. Most of Paull's history is a mystery. My theory is that Paull made the Regal as an in-house competitor for their regular No.0 that was marked Paull's. The Regal looks more like the competition. The patents are no clue because they were stamped into the lid for over 4 decades. I think that Wheeling Stamping endured longer than bigger producers because of their elegant true hot lift, the only maker to hinge the lift at the front of the globe plate (1890 patent), allowing the globe motion to back-away from the burner and for the globe to be easily removed at the front in hot blast fashion. (cold blast globes remove at the rear)
There are other tid-bits in the archive here if you do a search for Paull's. Another reason for Paull's longevity may have been their other stamping products. Wheeling was an early producer of metal tubes for toothpastes, ointments and artists' oils. They invented tubes with a plastic spout that were used on the first tubes of Crest.