Vintage 70s one of a kind crochet dress

this beautiful crochet dress had been in my closet for like 20 years! it's been loved but ready for a new home. the tag says large but it definitely is not large. it has been altered but even now that is was not very big. fits more xs/s/m. please check measurements. also the inner slip is separating in a few places but completely unnoticeable when worn.. I seriously bet someone wore this to Woodstock!!!