An Yixing ovoid vase 18th / 19th century

An Yixing ovoid vase 18th / 19th century, the sloping body decorated in a speckled jun-type glaze running through deep red to pale blue, impressed seal mark to the base, 24cm. Provenance: the Arthur J Harris collection. Cf. K S Lo, The Stonewares of Yixing from the Ming Period to the Present Day, p.143 for a similar example.