Yes, if Finnish it's a puukko (term also commonly but mistakenly used
for most all Nordic knives of this design). The same style was also
made in Norway and Sweden. (I collect and make puukko).
The style of sheath is called Kalavala. Too bad the blade is so badly worn as most were signed by the company or maker. Most of the Finnish puukko were signed in the fuller while the Swedish and Norwegian ones were signed on the
blade itself usually on the upper portion. Many of the Norwegian and
Swedish ones were (are) made with laminated steel. If you're interested
in the design and would like to see many modern ones check out this site.
Ragweed Forge:
http://www.ragweedforge.com
Check out the Jarvenpaa, Ahti, Helle, Lapin Puukko and Mora sections especially. Some of the other brands also sell the same design.
Rich S