If it is really in NRA Fair condition, it's worth the value of any useable parts. If the gun is complete and functional, it will grade something better than fair. Since you do not indicate what model it is and FN (Fabrique Nationale) made several guns on Browning patents, about all I can say is that your gun was apparently intended for sale in continental Europe since it is marked only in French.
Louis Hymans has written: 'Histoire parlementaire de la Belgique de ...' 'La Belgique contemporaine' -- subject(s): History 'Histoire parlementaire de la Belgique de ...' 'Histoire populaire de la Belgique'
Jean-Pierre Hamblenne has written: 'Saints et saintes de Belgique au premier millenaire' -- subject(s): Christian saints, Biography, Church history 'Chouannerie et contre-revolution en Belgique 1792-1815' 'Saints et saintes de Belgique au premier millnaire'
Charles Terlinden has written: 'La Belgique il y a cent ans' -- subject(s): History 'Histoire militaire des Belges' -- subject(s): Military History 'La reconnaissance par la Belgique du gouvernement national de l'Espagne' -- subject(s): Foreign relations, Politics and government
Roy E. Gridley has written: 'The Brownings & France' 'Browning' -- subject(s): Criticism and interpretation, Dramatic monologues, History and criticism
A. G. B. Schayes has written: 'La Belgique et les Pays-Bas' -- subject(s): History
Contact Browning. They now offer history letters.
Nicolas Perrin has written: 'Italiens de Belgique' -- subject(s): Emigration and immigration, Italians, History, Social conditions, Immigrants
Charles Turquin has written: 'Belgique, 1940-1945' -- subject(s): History, Pictorial works, World War, 1939-1945
Henri Pirenne has written: 'Mohammed and Charlemagne' -- subject(s): History 'Histoire de Belgique' -- subject(s): Accessible book
Anne Cornet has written: 'Congo Belgique' -- subject(s): Public opinion, Decolonization, Colonies, Belgian Propaganda, Pictorial works, History
You can find out how old your shotgun is, by going to the FN website and sending an e-mail to the commercial manufacturing division. Value is decided by condition, markings, and history of the gun.
Browning offers history letters on their website for a reasonable fee.