The 517 is a typical Levi's Bootcut model, made in February 1980 and, speaking of 501s, during the 66chain to redline.
"FOR OVER 125 YEARS" and a guarantee ticket for the same pre-schunk model as the 505.
It's no different than the one used for the 505, etc. Parallel stitching in navy, the same color as the fabric, next to the top button.
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