1930 United States Assay Commission Medal. By John R. Sinnock and Adam Pietz. JK AC-74. Rarity-4. Bronze. Edge Incuse HON J. WHITAKER THOMPSON. MS-64 (NGC).51 mm. A second Choice example of this issue, with dominant olive-brown patina and lighter reddish-apricot outlines to some of the design elements. The edge marking is not noted on the NGC insert.From Presidential Coin and Antique Co., Inc.s Auction Eighty, June 2010, lot 334. Lot tag included.