Summary

DescriptionRoundel of the United States (1919–1941).svg	English: Roundel used by the United States armed forces from 19 August 1919 to 6 May 1942 until red dot removed to avoid confusion with Japanese insignia. Superseded very similar roundel whose colors and proportions differed slightly - the original version having the colors from the US flag, and a center dot 1/3 of the outer radius. This version has a center dot constrained by the inner vertices of the star, a size that does not translate into an even fraction.
Date	6 June 2012
Source	Grumman F3F-2 USN F3F-2 colors consistent as per this & this Elliot, John M. (1989) The Official Monogram US Navy & Marine Corps Aircraft Color Guide Vol 1 1911-1939, Boylston, MA: Monogram Aviation Publications ISBN: 0-914144-31-6. Elliot, John M. (1989) The Official Monogram US Navy & Marine Corps Aircraft Color Guide Vol 2 1940-1949, Sturbridge, MA: Monogram Aviation Publications ISBN: 0-914144-32-4. Bell, Dana (1995) Air Force Colors Volume 1 1926-1942, Carrollton: Squadron Signal Publications ISBN: 0-89747-316-7. According to Section 40.1.1.2 Color of MIL-STD-2161A (AS), the colors of this insignia are established as FED-STD-595 red 11136 white 17925 blue 15044. The visualization of the colors comes from http://www.colorserver.net/showcolor.asp?fs=11136+17925+)
Author	NiD.29
Permission (Reusing this file)	This image shows a flag, a coat of arms, a seal or some other official insignia. The use of such symbols is restricted in many countries. These restrictions are independent of the copyright status.

Roundel of the United States Army Air Corps used from 1926 to 1941. When the Air Corps name was changed to the United States Army Air Force which retained the roundel until 1942 when complaints came that the red dot in the centre of the star could be confused by anti-aircraft personnel or other pilots for Japanese aircraft (their roundel was a red circle). The roundel was revised in 1942 with the red dot removed. This is a colour correction to Image:USAAC_Roundel.svg by User:Bburton who has released the image into the public domain.

Licensing

This image is in the public domain in the United States because it contains materials that originally came from a United States Armed Forces badge or logo. As a work of the U.S. federal government, the image is in the public domain in the United States.

Source Pic here, and here