KANGXI SIX-CHARACTER MARK IN UNDERGLAZE BLUE WITHIN A DOUBLE CIRCLE AND OF THE PERIOD (1662-1722)

The cylindrical body is covered overall in a dark purple glaze thinning to a slightly paler aubergine glaze towards the rim, stopping neatly above the foot.
Compare with a very similar Kangxi example covered with a rich coral-red glaze, sold at Christie’s New York, 17 September 2019, lot 62.