Boomerang information? region?

[Tim Simmons]

This has been hanging around for a while. I show it as we seem to have a member that may be able to give more information as to where it is from in Aus or if junk. I do not know if it is old but saying that I do not feel it is recent. I imagine early 20th cent?. 72cm from tip to tip in a straight line. The wood is not particularly heavy. The boomerang has a wing profile as you would expect but also a slight twist like a propeller blade. my pics are not that good. The wood is reddish brown that has been blackened perhaps charred? {hardening ?} and polished. Then the surface appears to have been scraped and or rubbed back. I have to say the carved decoration under x10 mag does not appear to have been made by metal tools but nothing sensational in that. Opinions. Go on I can take it.