This large bowl has strange trees that look like giant ferns from some prehistoric age. Various flamingos, cranes and wading birds are etched in between the trees. It is a heavy bowl. It is 9" (22.9cm) at the top, 5" (12.7cm) at the base and 6" (15.2cm) tall. Unsigned. Has anyone seen anything like this bowl? Does anyone have any information on maker or age?