Description
This collectible set of two postage stamps was issued by Vatican City to commemorate the twentieth anniversary of the Pontifical Academy Scientiarum.
Date of issue: October 8, 1957
Watermark: Crossed Keys
Designer: A. Grassellini
Printers: IPS Off. Carte Valori (Officina Governativa Carte Valori)
Perforation: comb14
Printing: Photogravure
Mint, never hinged condition.
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