Attributed to Otto Thamm and Fritz Heckert (German), an iridescent glass vase with ‘Jack in the pulpit’ neck, c.1901, ground out pontil, The yellow body decorated with green threads and an iridescent surface, 34.5 cm high Stefania Zelasko, ‘Fritz Heckert - Kunstglas Industrie 1866-1923’, Glasmuseum Passau 2012, p. 230, Cat. Ref. 417 (similar design drawing of shape illustrated p. 194 & 196)Some bubbles and speck inclusions in the glass from the making process. A few fine scratches and some light wear. Light wear to underside of base. Some dirt to interior.