A trench art knife or letter opener made in 1914 probably during the siege of the fortified city of Namur in Belgium between August 20-25, 1914, when German and Austro-Hungarian forces fought and defeated the defending Belgium and French forces.  Like many other trench art items this knife is made of an artillery shell fragment which can be seen from the ridges in the handle.  On one side of the ricasso "1914" is etched and on the other side "Namur" is etched, hence associating this trench art knife to the time period of the siege. The knife length is 17 cm (6.70 inches).