Caithness Glass (1970) "Moonflower" abstract air bubbles paperweight, by Colin Terris. Four spaced elongated bubbles rise around a central dark green translucent spire from a cobalt blue and black mound, scattered with small bubbles. Signed. This unlimited design was the first in the abstract field produced by Caithness Glass and is a depiction of an extra-terrestrial plant. Diameter 3 5/16".