Regimental Sergeant Major—Chevron of three stripes and three arcs of a circle below them. Sergeant Major Senior Grade, Coast Artillery—The same. Quartermaster Sergeant, Senior Grade—The Quartermaster Corps insignia with a wreath below and a star above it. Master Hospital Sergeant—The caduceus insignia of the Medical Corps with a wreath below and a star above it. Master Engineer, Senior Grade—The castle insignia of the Engineer Corps with a wreath below and a star above it. Master Electrician, Coast Artillery—A design representing forked lightning with a wreath below it and a star above. Master Electrician, Signal Corps—A wreath with forked lightning at the top and the Signal Corps insignia in the center. Master Electrician, Quartermaster Corps—A wreath with forked lightning at the top and the Quartermaster Corps insignia in the center. Band Leader—Chevron of three stripes and two arcs of a circle below them with a trumpet in the center. Hospital Sergeant, First Class—Chevron of three stripes and one arc of a circle below them with a caduceus in the center. Hospital Sergeant—Chevron of three stripes with a caduceus below them. Engineer Coast Artillery Corps—A design representing an engine governor with a wreath below it and a star above. Ordnance Sergeant—Chevron of three bars with one arc below it and the insignia of the Ordnance Corps in the center. Sergeant Quartermaster Corps—Chevron of three stripes with the insignia of the Quartermaster Corps below them. Supply Sergeant, Regimental—Chevrons of three stripes with three horizontal bars below them. Battalion or Squadron Sergeant Major—Chevron of three stripes with two arcs of a circle below them. Sergeant Major Junior Grade, Coast Artillery—Chevron of three stripes with two arcs of a circle below them. Supply Sergeant, Battalion—Chevron of three stripes with two horizontal bars below them. First Sergeant—Chevron of three stripes with a diamond shaped lozenge below them. Sergeant First Class, Medical Department—Chevron of three stripes and an arc below them with the caduceus device in the center. Sergeant, First Class, Quartermaster Corps—Chevron of three stripes with one horizontal stripe below and the Quartermaster Corps insignia in the center. Sergeant, First Class, Corps of Engineers—Chevron of three stripes with one arc of a circle below them and the Engineer Corps insignia in the center. [Illustration: U. S. Army. Noncommissioned officers’ chevrons Quartermaster Corps 1. Quartermaster Sergeant 2. Sergeant, First Class 3. Sergeant 4. Corporal] [Illustration: U. S. Army. Noncommissioned officers’ chevrons Signal Corps 1. Sergeant, First Class 2. Sergeant 3. Corporal 4. Lance Corporal]