Vintage 1970s faded french work trousers

Mens vintage 1970s french work chore trousers in super faded blue, also they're really soft because of lots of wear.

Tag size 50, fits a W36 L29 but rise is 11" so may be longer, leg opening 9.25".

Fair vintage condition, has lots of black Mark's which I assume is bitumen or something similar. One of the belt loops is also loose but can be resewn.