Vintage dress size S. St Michael from Marks & Spencer

Vintage beautiful dress. St Michael brand from Mark and Spencer, purchased in Britain in 1996. Side POCKETS!. Amazing Pearl buttons. This most feminine style would never go out of fashion. Can be worn for any occasion: casual vacation, office, night out, party. 50 inches long. Buttons all the way down in the front. There is an area of discolored- see picture. It’s not very noticeable. Color is navy. Not accepting offers on this one - it’s super practical and I don’t mind keeping it.