Ferdinand II's motto is derived from II Timothy II.5: 'And if a man also strive for masteries, yet he is not crowned, except he strive lawfully'. The three crowns represent Ferdinand's three previous offices as King of Bohemia, King of Hungary, and King of the Romans.
Cf. a similar glaive in the von Kienbusch Collection, Philadelphia Museum of Art, described and illustrated in The Kretzschmar von Kienbusch Collection of Armor and Arms, Princeton, New Jersey, 1963, no. 566. An undated example is in the Leibrstkammer, Vienna (inv. no. A 1566).