Beautiful Lime Green Vintage Gown with Sequin Butterflies

This true vintage gown comes from Ann's Vogue Shoppe in Cleveland, Ohio. A Google search shows that the shop opened in 1956. My best guess is that this gown is from the 1960s. It is in excellent condition. The gown is lime green, with the skirt a darker green. The close-up of the sequin butterflies is truest to the color. The waist is 34", so probably a modern-day size 12.