1893 United States Assay Commission Medal. By George T. Morgan. JK AC-37. Rarity-5. Silver. Unc Details--Improperly Cleaned (NGC).33 mm. One of 25 silver impressions from these dies, precious few survivors of which have appeared in our sales in the last dozen or so years.From Heritages CSNS Signature Auction of April 2013, lot 5301.