Thank you! It is a favourite of mine.
Here's another three crown crown
. Three Crowns
is the national emblem of Sweden since the middle ages until today.
Sweden, 1 riksdaler/3 daler silvermynt, 1777.
Silver 878/1000, 29.2 g, 41.6 mm.
This coin has an edge inscription that says MANIBUS NE LAEDAR AVARIS - May I Not Be Harmed By Greedy Hands
. Filing and clipping of silver coins was a popular sideline...