Aussie cane knives are sharp on the opposite side to the hook.
After the cane has been burnt to get rid of excess foliage and snakes you cut and then turn the knife over and use the hook to throw the cane behind you. Its rotten work.
Like I said:- this knife is similar to the knives used in Oz to cut cane.
Where did the early sugar cane plantation workers in Oz come from? Tamil?
Albert does mention this tool also from Java - what old-time tools have you seen having been used there for cane?
Interesting thing to me is that this knife has no ferrule. Balinese tools for cutting cane, grass, light scrub have either a solid ferrule, or a socket to accept the hilt. The construction of this knife shown appears to have no ferrule, which means that it seems not intended for any sort of heavy work, and certainly not as a weapon
That's an issue to take into consideration, too.
Detlef, how about your other example?