Levi's 501 - a geek's guide This visual glossary is based on LVC models. For original denim photos, buy a book! LVC codes All early LVC have factory codes on the fly button. I believe the correct coding is: 555 (Valencia St), 554 (San Antonio), 822, u nknown Levi's factory used around 2001. 643 usually signifies a non-Levi's factory in the US - one such factory is Taylor Togs in North Carolina (conveniently near Cone), which prodocued LVC up to spring 2008. LVC have since moved production,