The 100th Anniversary of Robert Koch's Discovery of Tubercle Bacillus - Issue of 1980 Overprinted "Dr. R. KOCH CENTENARY TBC BACILLUS DISCOVERY" 1982
Now showing: Guyana - Postage stamps - 1982 - The 100th Anniversary of Robert Koch's Discovery of Tubercle Bacillus - Issue of 1980 Overprinted "Dr. R. KOCH CENTENARY TBC BACILLUS DISCOVERY" - 1 stamps.