If you wear Levi’s blue jeans, you know that most of their jeans have a little pocket above the pocket on the front right side of the jeans.

If you have ever wondered what the little pocket was for, wonder no longer. According to the Huffington Post, it’s a watch pocket.
Though people now use the pocket for condoms, coins, tickets and all manner of small items, it was originally where a laborer could keep his pocket watch safe from harm, according to Levi Strauss' blog.

The watch pocket is just one of Levi’s signature components. Other things that make Levi’s a pair of Levi’s include reinforced stitching along the crotch of the pants and the ubiquitous red label. However, the thing that really makes Levi's unique are its rivets. 

Jacob Davis, a Latvian immigrant, came up with the idea for the riveted blue jean. 

Davis, a tailor, purchased denim from Levi Strauss to make and sell work pants to laborers. Though denim is a durable fabric, Davis’ customers kept having problems with the pants splitting around the seams, notes the blog. 

Faced with that problem, Davis came up with the idea of reinforcing denim pants by adding copper rivets. 

According to the Levi’s blog, “Davis had originally used rivets on horse blankets, and he found they worked well for re-enforcing the stress point in men’s work trousers — particularly the corners of the back pockets and the crotch, which often tore apart when exposed to heavy duty wear and tear.” 

Davis took his idea to Strauss and the two went into business together. On May 20, 1873, the duo were awarded a patent for their idea. Many consider this date the official birth of the blue jean.