<b>1858 * - 1868 / Bruxelles, Galerie de la Reine, 3<58-60> then 6<60-68></b> ° 20.1.1827; + 6.6.1894. Engineer-optician. Brother of Henri Cerf. A business card depicting a camera states "English Optics", c. 1860. <b>1869 * - 1897 / Bruxelles, Galerie du Roi, 9</b> Optician. Photograph dealer from 1890 ca. Domiciled at this address from 5.5.1871. At this address, the name "Firm Joseph Cerf" was still being used two years after his death in the directories, followed by "Veuve" in 1897. <b>1882 - 1883 Ostende, Rue de Flandre, 14 bis</b> Portrait studio at this address. In 1880, the Brand brothers had a branch studio at no. 16. Perhaps there is a link, because Brand was Cerf's mother’s maiden name.