Vintage 1960s Dynasty Long Silk Dress

Vintage 60s Dynasty Striking Patterned Silk Dress, Made in Hong Kong, British Crown Colony, RARE. All original silk covered buttons (one missing but maybe move up the last button to replace it?). Side slits. Purchased by my grandmother in the 1960s. She wore it twice doesn’t recall when the one button went missing. Really clean all over no armpit marks. Love the colors and pattern. Armpit to armpit approx 17” flat Dress length approx 52” flat