The current Inspector General insignia was approved in 1890 by the Secretary of War. The insignia has not changed since then, and is still a crossed sword and fasces superimposed on a wreath. The wreath reads "Droit et avant", French for "Right and forward".
The Army Inspector General Collar Device is two gold disks, one with the Inspector General insignia, the other disk with the "U.S." letters. Worn on the collar of uniforms.