Vintage 70s Act 1 Groovy Flower Power Psychedelic Mini Dress M

Groovy little nylon mini from Act 1 New York. My guess is late 60s early 70s based on tag, but the absolute amazing condition gives me pause. The colors are so rich All of the buttons are functional This may have been altered, the hem is a little loose in areas No size tag Fits modern M ish Fairly straight construction Bust 19 Waist 18 Hip 20 Length 24 There is some stretch as well as seam allowance Vintage 60s 70s Groovy Psychedelic Flower Power Maximalist Dopamine