ARMY ACHIEVEMENT MEDAL USA complete in case, full size medal

ARMY ACHIEVEMENT MEDAL U.S.A. complete in case, full size medal with ribbon bar and lapel pin.
Octogonal bronze medal suspended from ribbon via a loop ring; scene depicts Department of the Army plaque complete with cannon, cannonballs and flags; under the plaque is imprinted the year ‘1775’.
Reverse: Two slips of laurel facing opposite sides of the medal edges; above the laurel are the words ‘For Military Achievement’.
Ribbon: Thin green-to-white-to-green-to-white bands, then thicker blue to thin white to thicker blue bands at centre, with repeated white-to-green-white-to-green thin banding.
Ref: No. 34, Plate 2, Sheet 3, US Military Medals 1939 to Present, Foster & Bort.