Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,103 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
Ateliers de constructions Stapfer de Duclos et cie of Boulevard Maritime 42, Marseilles
Makers of stationary and marine steam engines and boilers, condensers, steam capstans ship's steering gear (Farcot-Duclos servomotors)
1865 Founded by Emile Duclos.
A 1/4 scale model of steam steering gear, made in 1882, is on display at the Musee des Arts et Metiers. Inv. No. 09910.
Description and drawing of steam steering gear (serve-moteur) here.