Vatican, Papal State. An Order of St. Gregory the Great, II. Class Knight Commander for Military Merit, c. 1930s Auction Footnote: The USS Nautilus (SSN-571)

Footnote: The USS Nautilus (SSN-571) was the world's first operational nuclear-powered submarine

the panels beside the opening on both sides

It begins with a Compilation page

the Air Force Air Force Cross

Vatican, Papal State. An Order of St. Gregory the Great, II. Class Knight Commander for Military Merit, c. 1930s Auction Footnote: The USS Nautilus (SSN-571)(Ordo Sancti Gregorii Magni Ordine di San Gregorio Magno). Three piece construction, consisting of a Maltese Cross with ball finials, the obverse with a central blue enameled circular disc bearing the leftward facing bust of St. Gregory, circumscribed Gregorius Magnus in capitalized lettering, the reverse with a similar central blue enameled circular disc inscribed Pro Deo et Principe (For God and Ruler) in capitalized lettering, circumscribed