Decortis single shot rifle, calibre 6 mm. Bronzed barrels with rise, punched "Decortis", block of falling breech, floating striker, stick in drowning in squared part with cheek, BE (scratches and oxidations), about 1880, manufacture of Liège. Decortis-Fraikin Gustave, active in Cheratte, circa 1881-1891 (source: littlegun.be)