German Silver 1 Ducat "Argenteus Issues. Pope Pius XII" 1958 X# M38

Obverse
Denomination in center of 6-pointed cross, lilies in angles
Lettering: I PRO PROSPERITATE MUNDI 1000 ARGENTEUS

Reverse
Bust of Pope Pius XII left
Lettering: PIUS XII. PONTIFEX MAXIMUS 1876 1958