Sceat Series D

Series D sceats are among the most confidently attributed Frisian issues, almost certainly struck in or near Dorestad, the Rhine-delta emporium that dominated North Sea trade during this period. Dorestad's position as a transit point between Frankish silver supplies and Anglo-Saxon markets explains both the wide distribution of these coins in the archaeological record and the remarkable consistency of their die-cutting compared to other sceat series.

Metcalf's die-linkage studies across types 158–180 revealed production in discrete, relatively short bursts rather than continuous output — suggesting mint activity tied to commercial seasons or periodic Carolingian administrative pressure on the region.