Antique Mother of Pearl Whistle Buttons!

A whistle button is a very unique button. It has one hole on the face of the button, and two or more holes on the back. What makes these buttons special is that when you thread them, the thread will not show from the front, so it is protected from wear and tear, snagging, etc.

The first picture shows the front, and the second picture shows the back of the button.image image