Vogue Paris Original Plum Purple Maxi Dress Size 4 6

This is a Vogue Original Maxi Dress from the 60's to 70's era. Length is about 52 inches. No size indicated but bust is about 34 inches and waist is 32 around. Entire length of skirt section has a layer that overlaps at the front. Long zipper in the front. Silky dark lavender bow at the waist. Condition is quite good despite its age. Some stray threads here and there but no stains, tears or other flaws detected. I estimate the size to be around a 4 or 6 based on measurements.