Marianne Aav, Rosa Barovier Mentasti and Gordon Bowyer, etal., Tapio Wirkkala - eye, hand and thought, exh. cat., Museum of Art and Design, Helsinki, 2000, p. 387
circa 1958 Tubular brass, leather-wrapped tubular brass, brass, painted aluminium. 52.2 x 23 x 23 cm (20 1/2 x 9 x 9 in) fully extended Manufactured by Idman, Finland. Impressed with manfacturer's lablel 'IDMAN'.