Frederick II, Viscount of Milan. Struct a silver coin of this name in 1225 on the occasion of the marriage of his son Henry. The Danaro of Azzone Visconti (1329-1339) is also so called; it has the inscription MEDIOLANVM in three lines. Barnabo Visconti (1354-1385) struck the Imperiale Nuovo with IMPERIALIS.
The value of these coins gradually de- clined owing to the impurity of the metal and in 1410 the pieces were only worth one half of the early issues.
Source: Frey's Dictionary (American Journal of Numismatics, Vol. 50, 1916)