Watch List notes:

Palermo, Guglielmo I (1154-1166), Ducale, c. 1154-1166; AR (g 2,53; mm 22; h 6); W REX R DVX FI LI VS EIVS, crowned king standing facing, holding globe cruciger; at l., the son Ruggero standing facing, holding sword, Rv. IC XC, the bust of Christ facing. Spahr 94.
Rare, about extremely fine.