I love this outfit!The new White Stripes CD "Icky Thump" show Jack and Meg White sporting super cool matching outfits. I had seen these black suits with mother of pearl buttons sewn onto before and actually ripped an image of these outfits out of a magazine. Upon seeing this CD cover today I had to investigate what this style is all about. Apparently it's a traditional Cockney get up and is still worn for special occasions. The "Pearly King and Queen" costume is covered in mother of pearl buttons and the different patterns have special meanings, e.g. a horseshoe represents luck, a dove stands for peace or a heart for charity. It was often past down as a family heirloom. More info about it here.