Vintage Scalloped Filigree Ring with Mother of Pearl and Split Adjustable Band

Lovely vintage cocktail ring with Mother of Pearl centerpiece and scalloped filigree border in a warm gold-plated finish. There is a maker's mark on the inner band, but I have not been able to identify the maker. This item is in perfect condition. Ships quickly and carefully from a smoke and cat free home (no offense to kitties). Offers welcome. Style notes: statement, ring, cocktail, bridal, minimalist, monochrome, cottage core BoHo, Bohemian hippie art, artsy, Bloom, Bloom, core garden fairy core, coastal, 1950s 1960s 1970s cruise resort wear, old money, coquette, office, siren, euros summer, twee