each: 2.9 x 3.9 x 0.8; overall: 23.3 x 24.1 x 0.8 cm
Drilled ceramic magnets, in 48 parts
Yutaka Nakajima, Tokyo (acquired directly from the artist in 1979); Kazuo Akao, Tokyo; Private Collection, Japan; Anon. sale, Christie's New York, 18 May, 1999, lot 204; Adam Gallery, Bath; Private Collection; Anon. Sale, Sotheby's London, 8 February, 2007, lot 378; Acquired at the previous sale by the present owner.