Four lac burgauté snuff bottles

Four lac burgauté snuff bottles
19th/early 20th century
All worked with mother-of-pearl and gold foil, two of bianhu (moon flask vase) shape, possibly made in Japan, decorated with a circular flower panel to each main side; the third an ovoid bottle, designed with a central chrysanthemum medallion on a diaper ground, the underside inlaid with an apocryphal Qianli mark; the fourth a high shoulder bottle, each side with a reserve panel framing a flower sprig alternated with a flower head, the narrow sides further adorned with repetitive diapers.
1 3/4 and 2 3/8in (4.5 and 6cm) high