Both eagle and boar were used, stamp shape changed to indicate city of assay. In 1938, the Roman numerals changed to Arabic numerals and the boar mark retired.
Pentagram is a quality mark indicating a minimum of .915 purity, it is usually accompanied by a maker's mark in a hexagonal stamp or an importer's mark in a triangle.
Sweden
1912 - Present Marks used from mid 18th Cent.- 1912 are very similar.