I have the "Sissipuukko" made by a Finnish knifemaker Juha-Pekka Peltonen. The word "sissi" translates as "a guerrilla" but since there is an army branch of that name, the meaning is more closer to, let's say, a US Ranger than some guy fighting the government or something. But now, back to the point. The knife has a flat ground, 6.1 inch carbon steel (I don't know what type of) blade, which is "gun blued". As far as I know, that won't provide any protection against corrosion. If I'm wrong here, please correct me. The total lenght is about 11 inches and the handle is made of...I'm not sure about this one, it looks and feels like the handle material in the Special Forces Jungle Machete from United Cutlery, so would that be Kraton or what? It's not slippery when you've got wet hands or anything, but I don't know how much abuse it would take. The handle has grooves in it for a better grip, but there's no actual fingerguard, just the downward (when holding the knife horizontally, back of the blade up)
curve in the each end of the handle, which creats a "hump" in the end.
The sheath is made of thick leather and has a small "wheel" in it, that keeps the knife in the sheath even when it's upside down. The other "hump" goes over the wheel when being inserted in the sheath and it feels very secure. It can be worn on the belt or the alice-system. The sheath doesn't allow quick draws because of the wheel and the proper way to draw the knife is to place your thumb over a small piece of hard rubber riveted close to the open end of the sheath and direct all the force on it. By doing this, you prevent possible damage to the roller inside and the knife comes out smoothly. There are sheaths for lefties, too.
The knife is not a pure fighter, it was basically designed for utility-purposes, as the flat grind offers a stronger edge. But it's extremely popular among military personel, though.
I think this is the closest thing to "tactical Puukko" that Finland has to offer. The materials (especially the handle) and the finish aren't very traditional, but this clearly is a Puukko anyway. If I only knew where to find a picture of it online...I hope this helped a little.