Nason Murano disc vase

Disc vase, V. Nason & C., Murano, 1970s–1980s.
Glass in two layers: outer layer in violet-mauve coloured glass, inner layer in white opaline. The form is a flattened disc with a central cylindrical opening. The double layer creates chromatic variation by transparency, with the violet deepening toward the opening. Original label on it.
 
measurement
diameter 22cm
height 7cm