Vintage Levi’s 50 one button fly jeans

Vintage condition they have natural distressing. They have the single seam down the inseam which is known that these jeans were probably made prior to 1980 however, I am not 100% positive about that these were also made in Mexico lions. Flat waist measures 16 inches rise measures 10 inches and the inseam measures 28 inches these have not been altered.