Original Large (1.5 inch in diameter=40mm) 'AMATEUR ATHLETIC UNION OF THE UNITED STATES MDCCCLXXXVIII'= '1888' 'CHAMPIONSHIP MEDAL' NIAGARA ASSN. 'A.A.U.U.S' .   The Medal is Suspended on its original Ribbon with Pin Back  'CHAMPIONSHIP' Top Bar.  The Medal hallmarked 'STERLING' 'GOLD PLATED' and is scanned near a quarter to better display its size (SEE SCANS).