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Norwegian silver was from 1608 stamped with 13 ½ lodd (by law, Christian IV), who is equivalent to 843 S (843/1000). In the 1800´s it was permitted to stamp silver with 13 ¼ lodd. 13 ¼ is equivalent to 830 S. When Norway switched to decimal system in c. 1892, the 830 S (minimum standard), and 925 S ...