Here's a fine puzzle.
The host is gone. All I can tell you is that it came in a lot of Swedish tokens, it's bronze or copper, 25.0 mm and 3.14 gram (could it have been 3.57 gram before the hole?). By letting it reflect light, I can see a very small Kawaii animal head with a funny hat on the centre reverse, but that could be a coincidence, rather than what remains of the previous iteration of this piece of metal.
The best I can think of for the other side is neither good, nor helpful. Dividing the diameter by 7 you get 3.57? How is that significant? The drakkar rings no bells - well, maybe monastery bells to warn the monks to go into hiding. Puzzling.
Peter