75th Anniversary American Chemical Society

Front:
FIRST DAY OF ISSUE MERCK & CO. PHOTO Art Craft FEAR ORK SEP 4 9-AM 1951 АДС 75th Anniversary CHEMICAL SOCIETY AMERICAN CHEMICAL SOCIETY DIAMOND 1876 AAC DIAMOND 1876 SCU.S.POS AGE 3C FIRST DAY OF ISSU AMERICAN CHEMICAL SOCIETY JUBILEE 1951 AAC JUBILEE 1951 36 AMERICAN CHEMICAL SOCIETY DIAMOND 1876 AAC 3CU.S.POSTAGE 3 JUBILEE 1951 AMERICAN CHEMICAL SOCIETY DIAMOND 1876 AAC Orville H.Black 913 Garden St. Peoria 2, Ill. JUBILEE 1951 3CV.S.POSTAGE

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7771 BIG //