Königlich Bayerisches Infanterie-Regiment “Prinz Arnulf” Nr. 12 was founded in 1814. It was garrisoned at Neu-Ulm and attached to the I. Armeekorps. It is a badge commemorating the regiment’s 100th Anniversary in 1914. The badge is eight-sided and measures 1 ½” x 1 ½.” Its center features Prinz Arnuff’s royal cypher. Attached to the top is a small ribbon and a safety pin. It has no manufacturer’s hallmark.