1899 United States Assay Commission Medal. Silver. 34 mm. By Charles E. Barber and George T. Morgan. JK AC-43a. Rarity-5. Mint State.This smartly impressed, sharply defined example is richly and originally toned in steel gray. According to the annual report of the mint director, 40 silver Assay Commission medals were produced for 1899, along with 10 bronze impressions.