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That is a very beautiful knife but highly impractical. It's "welded with solder" or something instead of using pins or corby screws. The sheath looks just annoying to use. The knife is in too deep. For any serious tasks I'd grab something else. The handle material looks great, but in combination with the tasks in mind (seawater, so sailing etc) it's one of the worst materials to choose for a knife like this. It will always feel cold and might even be slippery. Also, salt water and leather isn't a great combination.
It's a nice letter opener but I'd rather use a good full tang fixed blade with Micarta (or G10) handles and a Kydex sheath or even a stainless Mora if I had to do some serious tasks.