44 mm

Obv.:

PIVS • X • PONT | MAX • ANNO • I •

(below the bust:) BIANCHI

Bust of Pope Pius X, r., wearing zucchetto, mozzetta and stole.
(restoration of a medal of the first year of Pius X's reign, Mazio 863

PIVM • X | CVIVS • VIRTVS • INCLITA | ECCLESIAM• LAETIFICAT | PIVS • XII • PONT• MAX | SANCTORVM • FASTIS • ADSCRIPSIT | IV • KAL • IVN • A • MCMLIV

"Pius XII, Supreme Pontiff, inscribed Pius X, in whose outstanding virtue the Church rejoices, on the lists of the Saints, May 29, 1954"

Above, the arms of Pius X; below, the arms of Pius XII