The Z Guide to Levi's Jeans: Levi's Numbers Explained — ZEITGEIST
Vtg Levis Denim 501 Redline jeans 26 x 31 measured 524 Button Selvedge USA Dark | eBay
general question: do all modern levis have a number on the inner button? everything about these jeans looks ok except the number. Sorry for offtopic : r/VintageLevis
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number 16 button stamp. Levis big E Hidden Rivets : r/VintageLevis