The word is Finnish as you state, but I could not find any Finnish bike with that name. One or two Swedish bikes, though I couldn't see a match to the emblem yours has:

http://mo-ped.se/bike/bike_s.htm#Semper

The emblem certainly looks like the Finnish State lion, but then again lion is a common theme in Nordic emblems. The Nokian tyre is definitely Finnish. Is there any other text anywhere in the frame?

--J