Question about stamp inside diamond eternity band

[pierrotlunette]

Hi Folks,
Does anyone know what this stamp is next to the platinum designation on this eternity band? It looks like an arrow (or perhaps a tree?) inside a circle. Is this a clue to the maker/brand?



Many thanks!

 

[OoohShiny]

It might be a mark from the casting company - adwar or similar.

 

[pierrotlunette]

Thank you!