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Published 07:25 31 Aug 2018 BST
Updated 09:40 31 Aug 2018 BST

But in times gone by, it had a use, the tiny little pocket inside a pocket is actually for watches, designed for cowboys in the 1800s.
You won't find too many cowboys roaming the streets nowadays, but according to the Levi Strauss website, the pocket was: "Originally included as protection for pocket watches, thus the name, this extra pouch has served many functions, evident in its many titles: frontier pocket, condom pocket, coin pocket, match pocket and ticket pocket, to name a few."
Nowadays, we've upgraded to telling time with smart watches and phones, but the tiny pocket lingers on as a reminder of where we've come from.Explore more on these topics:

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