VINTAGE 70s mauve button down long sleeve top tie waist

Vintage 70s mauve purple ish button down top with waist tie. No tags has a slight silky texture probably polyester. Slightly sheer under tight light. One on the belt loop strings is broken and there are very faint light marks to fabric have no tried to spot treat but top gas Ben washed refer to close up photos. Fits towards the small medium range. Refer to measurements photo. Model typically wears a modern small or 5/6.