Vintage 1970s Green Crocheted Slip Cocktail Formal Dress Crocheted good Overlay 9/10 Butterfly Sleeves

My mom wore this. It's perfect for any event. Lightweight, slip like shell with a crocheted overlay on top. Full skirt. In great condition. Zipper down the back with a string tie belt. As well as same on top of each shoulder. The overlay has butterfly sleeves. It is not lined.
I measured flat across good so double the numbers for size. Tag says 9/10
Washed on delicate hand wash cycle and line dried beautiful.
Bust: 15”
Waist- 12”
Hips- 20”
44” long