Some interesting info I stumbled across & the 2nd paragraph from Russian gives that the Crossed Cannons were G.D-S's trademark?
Die Firma wurde von Guillaume DEFOURNY(-SEVRIN) (1865-1916) geründet. Seit seiner Hochzeit mit Rose Sevrin nannte sich die Familie DEFOURNY-SEVRIN. Seit 1924 scheint als Firmenadresse die Rue Cheri, 11 in Lüttich auf. Der letzte Eintrag stammt aus dem Jahr 1959. Anderen Quellen zufolge existierte die Firma von 1896 bis 1955.
G.Defourny-Servin Guillaume. The manufacturer of luxury weapons in Liege. The company was founded in 1895. In 1908 it changed its name to Defourny G. & J. In 1949 it changed its name to Defourny-Servin G. There was until 1955. Trade mark "two persechenii gun" has never had. Author 5 Belgian patents. Address Liege, rue Cheri 11.
"Antoine Joseph Defourny. A talented employee / partner L.Brancquaert company in Brussels. Since 1895 had its own small companies produce no more than 15 guns a year. In 1901-1902 he invented and patented gun model with vertical shafts, which allowed the company to receive the title of Bronkart supplier of arms of the king of Spain. In 1905 he organized his own large-scale production by investing heavily in the organization of workshops with a steam engine. Trade mark - two crossed guns. In 1913 AJ Defourny received the title of Chevalier of the Royal order of the arms industry Liège management, and in 1928 became an officer of the organization as a reward for being on behalf of the Government successfully represented exposure Belgian gunsmiths in the international trade fair in Milan. In 1944 the company changed its name to Defourny AJ armurerie SA, under which, and lasted until 1967. Author of 15 Belgian patents. Location Herstal, rue Foxalle."
http://forum.guns.ru/forummessage/112/557347-2.htmlI'm very open to a proper translation, of course.
Cheers,
Raimey
rse