Denim skirt vintage from 1970s

denim skirt vintage 1970s amazing condition for age it had been stored in a dress bag for years in an attic it's missing 3 of the original brass buttons but can easily be replaced and I have seen them online for sale and included a picture of some, the buttons alone have some value to them and say kemington ga express 20 the 20 on the button indicates size of button this is a rare excellent vintage condition piece size inside says 9 but vintage clothes seem to run smaller and fits smaller I wear a size 4-6 and it fits when I tried on has beautiful retro orange stitching around 2 front pockets and down the sides and around the hem it all appears to be intact but please remember it is a vintage item and could possibly have something I'm not seeing great for vintage collectors