Watch Boutonniere. A diminutive (roughly 15/16ths of an inch) timepiece sized to fit a buttonhole. This example by Aucoc is encircled by glittering rose-cut diamonds and displays a minute porcelain dial, masterfully crafted and ingeniously designed to fit right into the button hole of your lapel. Watch mechanism and winding stem are secured in a small case that sits behind the lapel.
Watch Boutonnaire (Reverse).
Watch Boutonnaire (In a Fitted Box).