Fritz Heckert Green 'Cypernglas' Bowl [Otto Thamm design 1903]

A recent acquisition from a local junk shop by my wife (this one she likes !). It is 9 cm high and 12.5 cm in diameter at the base and made of iridised green 'Cypernglas'. It is an Otto Thamm design from 1903. The pontil is roughly ground and unpolished. A larger version in an identical shape can be seen in F. Zelasko's Fritz Heckert book on page 198 (vase 341).