Ming water-dropper bought for £10 sold for £50,000. A woman who bought an ornament at an antiques fair 40 years ago has been left stunned after it sold for £50,000.

Aug. 13-Nov. 27. According to Asian calligraphic traditions, there are "four treasures of the study": the brush, ink, paper and inkstone. Just as crucial, however, is the humble water dropper ...