Obverse and reverse of a coin of <a href="https://en.wikipedia.org/wiki/Berengar_II_of_Italy" class="extiw" title="en:Berengar II of Italy">Berengar II of Italy</a> and <a href="https://en.wikipedia.org/wiki/Adalbert_of_Italy" class="extiw" title="en:Adalbert of Italy">Adalbert</a>.
J. G. Pfister
Taken from J. G. Pfister, "On a Very Rare Silver Coin (<i>denaro d'argento</i>) of Berengarius II., King of Italy, with His Son Albertus (Adalbertus) as Coregent, A.D. 950–962", <i>The Numismatic Chronicle and Journal of the Numismatic Society</i>, vol. 18 (1855–56), pp. 57–75.