B26 - 18mm Glass button in Black (vintage)

This vintage Black glass button is approximately 18mm in diameter with a self shank. The centre of the button is cut away so a stone can be fitted into the button. The hollow measures about 9mm in diameter and down to a point about 5mm in depth.The button is in a good condition for its age although it may have some marks on it. It has not cleaned as this adds to the character and history of the button.