A superb pair of Derby covered bottle vases, circa 1830-40, in the Sevres style with the French style mark as used by Derby, fine vases in lapis blue with gilt cailloute, decorated with shaped reserves of summer flowers and exotic brightly coloured birds in landscape settings, blue marks underside; illustrated J.Twitchett, 'Derby Porcelain...', colour plate 148, height 24.5 cm