Mans, why would the snout have to protrude more to be hanuman. It still looks like a monkey to me.
We often see Ganesha, Siva and other deities and demons depicted in a variety of forms. I don't see how you can say this could not possibly be a hauman because it's snout isn't long enough.
Kai Wee, if the provenance is there for Javanese origin then you are undoubtable correct. It is interesting that in later Balinese blades we still see form and appearence that is closer to these earlier Jawa keris than what we see in later Javanese keris. For instance, the custom of polished blades that we normally associate with Bali used to be the normal practice in Jawa. Much the same happened when Yoruban music moved to Cuba in the diaspora. The Cuba music stayed truer to it's origins, perhaps in an attempt to maintain it's identity with Africa while the music in Africa continued to evolve and change. Beautiful blades regardless.