Originally Posted by BlackFox
Theyre taken from the comics, Origins didnt invent them.
Yes, but they have no reference in the movie universe until X-Men Origins: Wolverine.
That movie established, in the movie universe, that his claws are originally made of bone. Thus, their usage in this movie was capitalizing on the fact that X-Men Origins: Wolverine already established bone claws into the movie universe and that the time period of WWII was before he got the adamantium skeleton and claws.