All I can say aside from its amazing looks is that many Samoan pieces do have a little triangular "spike" at the butt-end with a hole in it (I assume to put a loop/lanyard through)
Which makes me think that you're right in saying that it is Samoan. Of course, you'd know better than me... That and on antique weapon websites I have seen the very same style of club attributed to Samoa (I won't link to them 'cause I'd get banned, but you have my word
)