A very rare variety of denarius with the emperor.
Distinguished by the reverse with the name of the prince written in four lines (instead of the common notation in three).
Out of 24 denarii of this type that we have had throughout history, this variety is the first time we have it.
The denarius of Boleslaus IV with the emperor on the throne, the issue of which is linked to the tribute paid to Frederick Barbarossa at Krzyzkow near Poznan in 1157.
The emperor holding a lilac scepter, with arches on his sides.
Beautifully minted and preserved, only with a weaker sound.
Silver, diameter 16 mm, weight 0.39 g.