Vintage Mexico Sterling Filigree Abalone Shell Brooch Pin Necklace Pendant

Stunning Vintage Mexico Sterling Silver Filigree Abalone Shell Brooch Pin. Can also be worn as a necklace pendant! Beautiful rainbow array of color flash. Unable to make out eagle mark number but I believe I have narrowed it down to either 28, or 38. Mexico Used Eagle marks between 1946-1979 Eagle mark, Hecho en Mexico Sterling 925 This Piece has gentle visible signs of wear, with naturally developed patina, and is in beautiful condition for it's age 45+ years likely much older. Please see photos/video for most accurate description, and measurements. Measures approximately 2" x 1.5" I have cloth only hand polished this piece, and will leave it up to buyer for further cleaning. V0411B1183