THEDA Sterling Silver Cultured Pearl Pendant or Large Charm

Dating to the 1960s or so, here's a Sterling Silver (hallmarked as pictured) and pendant or large charm. Featuring a 6.5mm Cultured Pearl at the center, the gem is highlighted by some nice engraving. In a round shape, the piece is slightly concave, giving off a nice flash when the silver piece is worn. Width/height (without bale/jump ring) is 1-1/8". Weight is 7.3 grams. Very fine condition with a high shine to the silver, due, I believe, to a rhodium overlay.