Very rare and heavy Song/Yuan brown glazed garlic head vase

It has 2 dragon handles and decorated with Ba Gua symbols on each side.  

Size: 7.5 in. (19 cm) W  x 6 in. (15.3 cm) x 9.75 in. (25 cm) H  

Provenance: From Dr. Robert I-San Lin Collection, whose grandfather was a major antique dealer during late Qing-early Republic; brought to California in 1960s.  Dr. Lin’s biography published in Journal of Artworks Authentication, ISSN 2095 - 9109.  2015, vol. 6.