The hidden (and not-so-hidden) meanings of 12 brands' favorite numbers

in the 1870s, when Levi Strauss invented his famous blue jeans, they were known simply as "XX." Two decades later, they were given the lot number "501®" and to this day, that three-digit number is synonymous with the Levi's brand.

Levi Strauss isn't the only company with close ties to a specific number. Read on to learn the stories behind other brands' famous numbers.