Three inside-painted glass snuff bottles

Three inside-painted glass snuff bottles
Wang Guanyu, Zhang Zenglou, and an unidentified artist
The first depicting the Song dynasty military general Yue Fei, the reverse inscribed, signed Wang Guanyu with one seal; the second painted with two historically important astronomers: Guo Shoujing and Zhang Sui (also known as Yixing monk), each side titled and inscribed, one side signed Zhang Zenglou, dated xingyou (1981), with seals; the third an overlaid bottle, the lower portion likely depicting the Gathering at the Orchid Pavilion, the overlay work to the upper section forming a reserve panel to the front and back, each framing an inscription.
2 1/2 to 3 1/4in (6.4 to 8.3cm) high