THE OFFICIAL OPENING OF AN ASTROPHYSICS STATIO
THE OFFICIAL OPENING OF AN ASTROPHYSICS STATION – CIRCULATED WITH CANCELLATION OF BOSQUE ALEGRE (5 JUL 1942)
VARIETY: BLACK COLOR IMPRESSION MOVED MORE THAN 4mm – BLOCK
COMMEMORATIVE, 1965 – ASTRONOMY – SPACE RESEARCH INTERNATIONAL COMMISSION – GJ 1298a – 1 VALUE NEW HINGED + 3 VALUES MNH
