8. During WWII, Levi Strauss & Co. painted the arcuate — the double stitched arc on the pocket — to conserve thread.
With resources scarce due to war rationing, Levi's had to eliminate some rivets, the cinch, and the trademark arcuate stitching on the back pocket, since that design was considered decorative and extraneous. However, the company managed to find a way to keep the look through alternative means — with a paint job. But despite losing those elements, the bare-boned version still had the structure to last, sacrificing none of its general strength and durability.