Brass, perforated brass. Manufacturers stamp, Taito.
Another example with 53cm diameter shade available: ref no. 2010019.
Provenance: Porvoo Cathedral, Finland
Literature:
Marianne Aav, Neva Viljanen, eds, 'Paavo Tynell ja Taito Oy', exh. cat. Designmuseo, Helsinki, 2005, inside cover, p.8
Ref: 2010009