There are many different ways to do the texturing on the blades.If you could post up a picture of the ones you are asking about I could probably tell you how it was done.
I know that most forged pieces that have the texture are done by using a ballpeen hammer and hitting it all over with the ball end of the hammer,and then leaving this texture where it isn't ground.
I leave hammer dings from the forge when I want to leave texture.
I also like to use metal that has deep rust pits in it then forge the blade and leave the pits and hammer dings when I grind.It leaves a very unique pattern that cannot be reproduced,and the fire and then the quench oil stops the rust and so makes a cool looking knife.
They do the flint chipped look on a knife with a Dremal tool and cuttoff blade.They grind the blade with a convex grind and then dig out sections with the cut off wheel making it look like a chipped arrow head or spear point,it is a cool look on a blade and is really easy to do.
Hope this helps out some,