Product No. ae744.

Filigree glass bottle, art glass.

Design, Kaj Franck. Year, 1962-64. Manufacturer, Nuutajärvi glass.

Height 32.5 cm, diameter 7 cm, weight 643 g.

Filigree is called into glass-blown glass that is fused to the surface layer streaks.

https://en.wikipedia.org/wiki/Kaj_Franck