Vintage Missoni Dress Small Sparkle Striped Colourful Cocktail

I wish I had worn this but it has just sat in my closet. I purchased it secondhand and was told there is a little spot somewhere but cannot see it! However, since being in my closet, the collar has come undone as shown and needs a mending. It’s also quite delicate and can pull easily, be sure not to sit on anything that will catch on it. May have some small pulls. No size or material tag but fits small. Chest: 16” Length: 35”