>>64066338
It's an old school all-steel single-stack single-action service pistol.
It was the Swiss military service pistol for years, saw widespread police use in Europe.
I think the Danish army issued them too.

These things have a reputation for excellent fit, finish, and accuracy, but they're kinda fragile.
The Swiss and German made examples are very good. Don't buy one of the new US-made versions, they're cheap slop.