Science pioneers - 2nd issue

350 £. - Torricelli - green and black - Stamping dentellation 141⁄2×131⁄2 b - Print calcography and rotocalco - Printed by I.P.Z.S. Rome - Sheets from 40 - Size 25 × 30 (mm) - Drawing of A.Titonel - Stamping 5000.000