An antique mercurial glass servants' wall call board decorated with 10 gold-bordered command entries on a black background. It is captioned "Chambre Monsieur", "Entrée Vestibule", "Entré Cuisine", "Bureau", "Chambre Madame", "Mr Louis", "Chambre amis n°1", "Chambre amis n°2". Presented in a moulded oak frame Marked "Force et Lumière électriques du Nord / 120, Rue du Connétable / Chantilly". Height 32 cm - Width : 37 cm - Depth : 8 cm