Hello Clément,
it's for sure not a Dayak dart quiver (tolor), they look very different. Please post a picture from one of the darts, this will help to determine the origin of your quiver. But your quiver shows a very good age from years of handling. Nice piece.
Here an interesting thread about dart quivers:
http://www.vikingsword.com/vb/showth...ighlight=tolor
Regards,
Detlef