Vintage selvedge Levi's 501xx shrink to fit jeans two horse patch

The back of the main button is stamped 552 Made in the USA red tag Front Tag reads W33 L34 The back side of the tag is faded but it appears to have the numbers 513 0014 on the top line Very bottom line reads 502-0000 Line above the bottom line is partly readable 552 091 45345-4 So this pair was made in San Francisco ca These are very worn and distressed. There have been repairs made to the crotch are Please take a through look at all photos These are collectors. For sure