Flash Description: On a teal blue shield-shaped embroidered item edged with a 1/8 inch (.32cm) black border, 2 1/4 inches (5.72cm) in height and 1 7/8 inches (4.76cm) in width overall, a black horizontal band at the upper third of the shield surmounted by three yellow vertical lightning flashes. The Beret flash was approved on 11 Jan 1972.
12th Special Forces Group (Airborne)
U.S. Army Reserves
Activated 24 March 1961
Army Reserves Chicago, Illinois
19 January 1964 Relocated to Oak Park, Illinois
1 September 1970 Relocated to Arlington Heights, Illinois
1992 De-Activated
Source: http://www.groups.sfahq.com/12th_special_forces_group.htm