66th MI Group Stein

[Escht]

Found this in an antiques centre in UK yesterday, no idea of the age of it , presuming it's fairly modern.

[VMI88]

I think you're right that this is fairly modern, but the 66th MI Group dates back to 1960.  Since then it's switched from Group to Brigade and back again, and exists now as the 66th MI Brigade.  Here's the full lineage from Wikipedia:

• Constituted 21 June 1944 in the Army of the United States as the 66th Counter Intelligence Corps Detachment.
• Activated 1 July 1944 at Camp Rucker, Alabama.
• Inactivated 12 November 1945 at Camp Kilmer, New Jersey.
• Activated 10 November 1949 in Germany.
• Allotted 20 September 1951 to the Regular Army.
• Reorganized and redesignated 20 December 1952 as the 66th Counter Intelligence Corps Group.
• Reorganized and redesignated 1 January 1960 as the 66th Military Intelligence Group.
• Redesignated 25 July 1961 as the 66th Intelligence Corps Group.
• Redesignated 15 October 1966 as the 66th Military Intelligence Group.
• Reorganized and redesignated 16 October 1986 as Headquarters and Headquarters Company, 66th Military Intelligence Brigade.
• Reorganized and redesignated 16 October 1992 as Headquarters and Headquarters Detachment, 66th Military Intelligence Brigade.
• Inactivated 16 July 1995 in Germany.
• Redesignated 28 February 2002 as Headquarters and Headquarters Detachment, 66th Military Intelligence Group.
• Activated 16 October 2002 in Germany.
• Redesignated July 2008 as the 66th Military Intelligence Brigade.

I was assigned to the 66th MI Brigade from 1989-1992, and to the 66th MI Group in 1998.  Nice find!  It represents a lot of very interesting Cold War history.