A RARE RU-TYPE GLAZED OVAL JARDINIÈREQIANLONG FOUR-CHARACTER SEAL MARK IN UNDERGLAZE BLUE AND OF THE PERIOD (1736-1795)The jardinière is of oval form with slightly flared sides, raised on four low bracket feet, and covered inside and out with a greyish-blue glaze thinning to a darker grey on the rim. The recessed base with six spur marks is also glazed and inscribed with the reign mark at the center.9 1/8 in. (23.1 cm.) wide, Japanese wood box