<br>
== Type I ==
''Petersen types M, P, Q, Y & AE Q. Rygh 489 & 493.'' <br>
850AD? to 1025AD <br>
In use from the prehistoric iron age in central Europe to as late as the C10th in Norway. <br>
=== Types M & Q ===
{|
|- valign="top" id="Kirkcudbrightshire"
<br>
== Type II Norwegian ==
''Petersen Types B, C & H. 750AD to 960AD''