BTW, if you look very closely at episode 17 "The turkey shoot", of the 1952 NBC TV documentary series Victory At Sea, you will get a glimpse of one of these knives being used by a native to trim a palm during WWII. IIRC it is visible at about the 17 minute mark on that episode.
n2s
edited to add link to the Turkey Shoot episode:
https://www.youtube.com/watch?v=uK-UjS4ntao