Rare Scandinavian ceiling lamp in brass and opaline glass, 1940s-50s

Rare Scandinavian ceiling lamp in brass and opaline glass by unknown designer. Reminiscent to designers of period like Paavo Tynell, Josef Frank and Hans Bergström.
Probably produced in Finland or Sweden, 1940s-50s.
Excellent vintage condition, with small signs of usage. All brass parts polished, all opal glass shades without cracks.

Dimensions:
Height 50 cm, diameter 45 cm
The diameter of each opaline glass shade is 10 cm, height including brass part with socket is 16 cm.