tiny pockets that fit in jeans.The small pockets date all the way back to 1890, which is when they were stitched into Levi's 'waist overall' jeans.They used to be commonly used for pocket watches back then but seeing as not many people use pocket watches these days, it may seem a bit pointless they're still there.However, it's actually due to sentiment with regards to WWII.
During this time the two corner rivets were removed as a way to conserve metal for the war effort and the rivets returned to the watch pocket after the war.To preserve the integrity of the early design, Levi Strauss & Co.
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