Stabbed with a knife point to check that it is silver and not silver plated. The preferred Scandinavian method of checking for dodgy silver. It was used in the Baltic area long after the cessation of Danegeld payments. eg. one of my William II coins also has this.
The TPGs are inconsistent in this method of rejection, frequently passing peck marked coins while rejecting others as damaged - it doesn't seem to rely on the quantity of peck marks! Pay no attention to the label, as it was a normal occurrence at the time.