This commemorative stamp from Guinea honors the centenary of the discovery of the tuberculosis bacillus by Robert Koch, one of the pioneers of modern bacteriology. Issued by the République Populaire Révolutionnaire de Guinée, the design features a laboratory scene symbolizing scientific research, with prominent medical glassware and a red cross motif representing healthcare and humanitarian efforts. The stamp reflects the global fight against tuberculosis, a major public health challenge. Its artistic composition blends science and symbolism, making it appealing to thematic collectors of medicine and Red Cross issues. A meaningful addition for collectors focusing on medical breakthroughs and historical discoveries.