The Jieffeco Model 1911 was a semi automatic pistol manufactured in Belgium.
See also List of pistols
Underbarrel pistols FN M1900 Semmerling XLM
References
Brandt, Jakob H. “Magazine der Selbstladepistolen Jieffeco und Melior”. Deutsche Waffen Journal, June 1995. Daubresse, Alain. Les armuriers Liègeois a travers leurs réalisations. Alain Daubresse: 2014. Daubresse, Alain. littlegun.be Gadisseur, Guy and Druart, Michel. Le Qui est Qui: de l’Armurierie liégeoise, 1800–1950, Tome 1, Editions du Pecari: 2005. Hogg, Ian and Walter, John. Pistols of the World, 4th Edition. Krause Publications, Iola, WI: 2004. Hogg, Ian V. and Weeks, John. Pistols of the World. Arms & Armour Press, London: 1978. Matthews, J. Howard, Firearms Identification. Charles C. Thomas, Springfield, Illinois: 1962. Olson, John, Editor. Famous Automatic Pistols and Revolvers, Volume 2. Jolex. Schroeder, Joseph J. Jr., Editor. Arms of the World 1911: The Fabulous ALFA Catalogue of Arms and the Outdoors. Follett Publishing Company, Chicago: 1972.