herman de vries, Niggenkopf-serie, 1975

Grey cardboard portfolio, 27 x 21 x 2.5 cm, bound with cloth ribbon. Houses 9 thick grey boards, 21 × 26 cm. First board titled 'niggenkop-serie' in black ink, signed 'herman de vries' and minutely dated '27-9-1975: 14:46 u 8 x om de 5 sec.'. Followed by 8 boards with mounted colour photographs, each 11.5 × 18 cm.

The pictures were shot every 5 seconds starting at 14:46 on September 27 1975, documenting a piece of sky above the Vorarlberg mountains in Brand, Austria. The catalogue raisonné mentions the work being an edition of 25 numbered copies, but this copy is unnumbered. Catalogue Raisonné: hdv 1975.091.6.