CHINA for Vietnam, 19th century Central part...

CHINA for Vietnam, 19th century
Central part of a blue-white "Hue" porcelain dish, depicting a dragon in front, holding a medallion inscribed with the character Shou, longevity, amidst stylized clouds and flames.
Conch mark within a double circle on reverse
(The rim of the dish is missing, mounted in a wooden frame)
Diameter at sight: 30 cm