Hi Cerjak. That is a really nice Teppo. And appears in good condition. The engraving on the barrel is done in very good taste. Your's is my favorite style with the iron trigger guard and the fancy trigger. Again, nice addition.
While I can't help with any translation/specific identification, there is a good chance there is a maker ID or other information on one of the lower flats of the barrel, behind the lock. There was on my Teppo. If you want some help taking the barrel off, let me know. It's a bit tricky. Took me a half day to figure it out. LOL
and I have photos. The barrel does not come off the way you would first guess. Rick.