double ring identification?

[seeker]

Hi can anyone help me with this one?
I've got no idea, only 25mm width across the rim.
Found in the Torres Strait.
cheers champs.

 

[GuntherHess]

looks like a Sauer's Extract or Fletcher's Castoria. Hard to tell without any embossing info.

 

[Tony14]

It may even be an RRR. There are quite a bit of possibilities.

 

[KentOhio]

It looks like an RRR to me too.