A 'Jian' gray-glazed tea bowl, Song dynasty

See a related bowl of this type with a similar glaze and the characteristic patterned network to the interior, attributed to the 12th to 13th century, sold by Yamanaka & Company, New York to Charles Lang Freer (1864-1919) in 1914, now in the National Museum of Asian Art, Washington, D.C., published on the Museum's website (accession no. F1914.112), together with another similar example (accession no. F1914.115).