A fine and rare Chinese Ruby-Red ground cup, Yongzheng six-character underglaze blue mark and of the period (1736-1795). The exterior of the cup is covered with a ruby-red glaze, has minute spots of varied shades created by the blowing of the glaze onto the biscuit, the interior and the base is covered with a transparent glaze, which has a bluish tinge. The centre is decorated with different fruits in famille-rose enamels. With an old fitted box from Republic period (1919-1949). The ruby-red glazed monochrome porcelains held a special place among the favourites of the Imperial household. Notably, the Yongzheng emperor presented a mallet vase covered with this exquisite ruby-red glaze as part of his bestowal to Ryukyu. This significant gesture is meticulously recorded in archival documents dating back to the 5th day of the 3rd month of the 10th year (1723). This distinctive glaze, derived from colloidal gold, imparts a range of captivating hues, from bright pink to purplish red or rose pink. Although its origins trace back to the Kangxi reign, surviving pieces from that era are exceedingly rare. It's during the Yong Zheng and Qianlong periods that we encounter more frequent examples of this glaze, typically adorning smaller-sized porcelains. A very similar pair of ruby-red glazed cups, see Qing Imperial Monochromes: the Zande Lou collection, no.16, pp.66-67. Another similar pair, see Treasures in the Royalty: the official kiln porcelain of the Chinese Qing Dynasty, pp.147. Also see 200 Years of Chinese ceramics, no.117, pp.111 for a similar cup. Compare to a ruby-red glazed cup with a 'Buddha's-hand' citron decorated on the interior, see the Baur collection: Chinese ceramics, Vol. IV, plate: A600. 8.5 cm diameter, 4.1 cm high