A.D. Copier - Leerdam - Vase, nail ball-shaped vase - Glass. The Netherlands - 1920-1949. A ball-shaped nail vase with a regular air bubble pattern made by NV Glasfabriek Leerdam. Designed by A.D. Copier. Andries Dirk Copier was a Dutch designer, jeweller, book binding designer and ceramist and is known to a wider audience as a glass artist and designer. The clear glass ball is made of clear glass with regular air bubbles. The vases are referred to as nail balls because of the regular pattern of air bubbles in the glass. This is the middle size (9 cm tall) of the nail ball series. Condition: The glass is clear and is without chips or other damage. It will be shipped with registration.