A collection of five Chinese overlay Peking glass bowls

A collection of five Chinese overlay Peking glass bowls, 20th century, comprising: one decorated with geese in a lotus pond in green against an amber ground, four-character Qianlong mark, 13.2cm diameter, one with mandarin ducks in a lotus pond in red against a blue ground, four-character Qianlong mark, 12.4cm diameter, one with scrolling lotus in green against a clear ground, a seal mark to base, 12.5cm diameter, one with butterflies among florets in amber against a blue ground, four-character Qianlong mark, 11.5cm diameter, and a square bowl, with precious objects in blue against a red ground, four-character Qianlong mark, 9.5cm square (5)