Army and Navy Uniforms and Insignia / How to Know Rank, Corps and Service in the Military and Naval Forces of the United States and Foreign Countries

by Dion Williams

Observer and plotter, Coast Artillery—An equilateral triangle with a bar below it, enclosed in a circle.

Observer, Second Class, Coast Artillery—An equilateral triangle enclosed in a circle.

First Class Private, Signal Corps—The crossed flags and torch device of the Signal Corps.

U. S. Army. Noncommissioned officers’ chevrons
Ordnance Corps

1. Ordnance Sergeant	2. Sergeant of Ordnance Corps
3. Corporal of Ordnance Corps	4. First Class Private of
	Ordnance Corps

U. S. Army. Noncommissioned officers’ chevrons
Medical Corps

1. Sergeant, First Class	2. Sergeant
3. Corporal	4. Lance Corporal

Cap Insignia.—The insignia for the front of the caps of all enlisted men are circular disks one and one-half inches in diameter with a raised rim encircling the coat of arms of the United States, made of gilt metal for dress caps and of bronze metal for service caps.