This is a nice backmark on this beautiful non-excavated Indian War cuff button for the Staff officers. This is the classic pattern of button worn by officers on both sides of the Civil War but the backmark dates it form after the War. The face of the button has the beautiful spread wing eagle button. Around the edge of the button it has the stars with the lined field background. It has the original back and shank nicely intact on the reverse. This has the maker's mark of Shannon, Miller & Crane. This is a very nice looking cuff button with fine detail. It will make a fine addition to your collection.