29.5 x 19 cm. Framed & behind glass : 34 x 23,5 cm.

Stationery with watermark and headed paper. Dated 13.XII.57. He thanks Dr. Heinz Keller, editor of the magazine "Werk", "for the beautiful design of the Curjel article".

Dr. Heinz Keller: 6.6.1906 Winterthur, 21.5.1984 Winterthur, 1934-72 curator of the Kunstmuseum Winterthur, 1949-68 art editor of the Swiss monthly magazine "Werk". As an exhibition organizer and art critic, K. was vehemently committed to the art of classical modernism. (...) The Kunstmuseum Winterthur owes a large part of its internationally important collection of classical modern art to him (...). K. maintained a lively correspondence with a number of artists. He is regarded as one of the most innovative Swiss museum directors of his time. 1951-56 Member of the Federal Art Commission. (Historical Dictionary of Switzerland).