77/ 562 Zwart, P. [N.K.F.]. "Why risk break down whilst there are N.C.W. cables with high ionisation voltage?" Specimen leaf (PROOF?) of p.50 of the English edition of the NKF catalogue, 1929, 29,5x21 cm., letterpress and photographs, printed in black and red, verso blank, tipped onto gray paper mount.

= Dated "1929" in pencil by Piet Zwart in lower left corner of mount. Verso mount w. annot. "Eng. Catalogus N.K.F./ 1929" and "P. Zwart Wassenaar/ 290 Rijksstraatweg" in red ballpoint by mrs Nel Zwart-Cleyndert.

Leaf from the extremely rare English edition of the NKF Catalogue. Cf. Purvis p.74 and ills. between p.122-123. For the Dutch edition: cf. Monguzzi p.39ff, Brentjens p.166ff, Broos '73 p.46ff, Müller p.49ff, Spencer '83 p.124f, Purvis p.72ff, Broos/ Hefting p.86f and Andel p.209 and 264f.