30th anniversary of the death of Giovanni Battista Grassi

25 £. - Portrait of Battista Grassi, mosquito and microscope - Color Green - Stamp Perforation 14 ¼ × 14 b - The Watermark stars - Intaglio printing - Printed from IPS Workshop cards values ​​- Sheets 50 - Size 24 × 40 (mm) - Drawing R. Mura - Edition 10.0125.000.