Strange piece back, for coments

[potapych]

Here are two pictures of modern banana knives; although the first pair seem another modified form of kama, the second is a dedicated banana knife. Fernando's specimen seems of a quite similar design to the latter, given that it is of decidedly superior craftsmanship and beautifully executed - almost to the point of overkill for an agricultural implement (Although, as you can also see, all things are possible ;-)