Albumin print, Suez Canal floating dredge, Drague No 19 chain, circa 1875

This historical photograph shows a rare, technically fascinating, and industrially historically significant close-up view of a steam-powered bucket-chain floating dredge (Drague) during the historical construction or expansion works on the Suez Canal in Egypt, taken as an original albumin print mounted on cardboard. The albumin process used was the dominant photochemical technique of that era, in which egg white was used to bind the light-sensitive silver salts to the paper, giving the photographs their characteristic warm sepia tone, a soft glossy surface, and high detail sharpness.

Masterfully composed in landscape format with rich detail, the motif documents the immense technical dimensions of the canal construction under Ferdinand de Lesseps, with the dredge's massive, intricate conveyor structure for extracting sand and mud towering into view, while numerous workers on the platforms and decks of this floating factory illustrate the harsh working conditions of the era. Such highly specialized machines were significantly constructed at the time by French shipyards, such as the Société des Forges et Chantiers de la Méditerranée, in order to successfully deepen the canal and make it navigable.

An authentic documentary detail is located on the back of the backing cardboard, where a contemporary handwritten pencil note reads "Drague Nr. 19 a long canal", identifying this masterpiece of engineering by name. This spectacular photograph, taken by a pioneering photographer whose name has not been preserved, dates from the period between 1860 and 1890. The antique collector's item features the dimensions of 27,7 x 19,3 cm and is in good age-appropriate condition with an even, slight toning. It shows small light creases at the edges and corners as well as minimal abrasion in the extreme bottom left corner of the image.