transformer core steel sheet, in 45 parts

each 6.2 x 10.5 cm (2 1/2 x 4 1/8 in.)
overall 278.5 x 10.5 cm (109 5/8 x 4 1/8 in.)

Executed in 1972, this work is accompanied by a certificate of authenticity and will be included in the forthcoming catalogue raisonné.