Original 1937 style 501XX was the first to have the red tab logo. These have a rounded top block with back buckle, straight leg, red line premium
LEVI'S LVC 1937 501XX 37501-0015 Selvedge Raw Jeans Buckle Back Men's 34/34 NEW*
Levis lvc 501xx 1947 - Gem
Vintage Levi's 501 Jeans - The Ultimate Collector's Guide
Vintage Levi's 501 Jeans - The Ultimate Collector's Guide
Lvc 501
Levis lvc 501xx 1947 - Gem
Vintage Levi's 501 Jeans - The Ultimate Collector's Guide
Levi's Vintage Clothing LVC Year 1937 Lot 501XX Vintage outfits, Levis vintage clothing, Vintage denim
Rare LVC Levi's Vintage Clothing 1937 501 XX Jeans Rigid Size 36 X 34 Japan Made