Recent acquisition Emerald ring, anyone know the maker mark?

[Heirloomjewls]

Hello all, I just purchased a ring from an estate that I have purchased from before. The owners had very nice things and I have bought several. This is 18k a 11 by 9 by 7or8 mm emerald. Clear baguettes as well. Probably from 1970s maybe slightly before or after. Anyone recognize the mark. It is a shape of a cut stone inside a circle, partial mark, I think. Thanks

 

[Heirloomjewls]

Hello all, I just purchased a ring from an estate that I have purchased from before. The owners had very nice things and I have bought several. This is 18k a 11 by 9 by 7or8 mm emerald. Clear baguettes as well. Probably from 1970s maybe slightly before or after. Anyone recognize the mark. It is a shape of a cut stone inside a circle, partial mark, I think. Thanks