OK, lets stick to English, keeps the tread interesting for our non Dutch visitors, hey they might even learn something here! 
I bought my Helle Trofe @ www.toolshop.de. A reliable web shop that offers free shipping within the EU on orders over 20 euros. Helle and EKA knives are hard to get in the Netherlands according to some people. Must say that I've never seen either brand in shops, besides I didn't want to go through the trouble of finding a shop that sells either EKA or Helle. With a reliable shop just accross the border and open 24/7 via the net it's not much of a problem though.
I emailed Helle about the handle finish they apply at the factory:
Question: Does the handle of my Helle Trofe knife have an oil finish (such as linseed oil) or do they leave your factory unfinished? Would you recommend an oil finish on the handle?
Answer: Yes, our knives are treated with oil, and that is what I can recommend you to do when the handle is going to be dry and lustreless.
Best regards,
AS Helle Fabrikker
v/Solbjørg Vik
So there's oil on the handle when it leaves the factory, but not nearly enough (or the wrong type?) to make the grain stand out like it does now. At first I applied a little oil (Corcol vloerolie) with a cotton rag then all of a sudden the planets aligned and the grain popped up beautifully. After that I soaked it for a few hours to intensify the pattern. Then came the tedious bit, wiping off the excess oil at regular short intervals to end up with a matte surface. The wood will "sweat out" the excess oil. If you pass this step the oil becomes glossy and a very sticky mess which takes ages to harden. Now the handle looks stunning and has a nice grippy texture, it doesn't feel smooth like a glossy lacquer finish would. Quite different from your Buck Vanguard.
Here's the equally nice reverse side of the knife.

I bought my Helle Trofe @ www.toolshop.de. A reliable web shop that offers free shipping within the EU on orders over 20 euros. Helle and EKA knives are hard to get in the Netherlands according to some people. Must say that I've never seen either brand in shops, besides I didn't want to go through the trouble of finding a shop that sells either EKA or Helle. With a reliable shop just accross the border and open 24/7 via the net it's not much of a problem though.
I emailed Helle about the handle finish they apply at the factory:
Question: Does the handle of my Helle Trofe knife have an oil finish (such as linseed oil) or do they leave your factory unfinished? Would you recommend an oil finish on the handle?
Answer: Yes, our knives are treated with oil, and that is what I can recommend you to do when the handle is going to be dry and lustreless.
Best regards,
AS Helle Fabrikker
v/Solbjørg Vik
So there's oil on the handle when it leaves the factory, but not nearly enough (or the wrong type?) to make the grain stand out like it does now. At first I applied a little oil (Corcol vloerolie) with a cotton rag then all of a sudden the planets aligned and the grain popped up beautifully. After that I soaked it for a few hours to intensify the pattern. Then came the tedious bit, wiping off the excess oil at regular short intervals to end up with a matte surface. The wood will "sweat out" the excess oil. If you pass this step the oil becomes glossy and a very sticky mess which takes ages to harden. Now the handle looks stunning and has a nice grippy texture, it doesn't feel smooth like a glossy lacquer finish would. Quite different from your Buck Vanguard.

Here's the equally nice reverse side of the knife.