Thank you! Sounds about right (except most likely Swedish). I wish I knew the steel, but it was a gift and the person who gave it’s knowledge ends somewhere around “it’s carbon, that’s good” (which is by no means bad in comparison to most).
Nice! I've actually got an old (~50+ yrs) Swedish Mora puukko from the 1960s-70s that I'm working on restoring.
Speaking of patina, here's some photos of the puukko when I received it and a WIP pic of the restoration job.