A pair of Chinese famille-jaune 'longevity' plates, six-character Guangxu mark, late Qing dynasty decorated with a shou character in the central medallion, encircled by wave patterns, and further four characters within medallions meaning thousands of years of boundless longevity alternating with swastika symbols, all within a band of hui pattern and against a yellow ground, underside with three floral sprays, 19 cm diameter