Mysteries from the sea (2)

Wrapped in seaweed, covered in sea growth, the object

was hardly recognizable when I kicked it on the beach.

After a clean up, here's what it became.

Perhaps not so mysterious. No doubt a spear gun, but it's origins are a mystery. 
Very primitive. There's a reel and a crude little trigger, a channel for the spear and a hole where a spring band, perhaps a slice of inner tube, was used as a propellant. 

Must have been used from a boat, as underwater the spear would float away;  probably a long 

spear - the gun acting as a launcher.

The carvings are the intriguing bit.  
Male figures (holding two cocktails?) and a row of heads along the barrel, much like the notches in a cowboy's six-shooter?  

Makes one wonder.

I'm sure the owner would recognize his carvings, so don't bother to claim the gun unless you wear a grass skirt.