Vintage Sarah Coventry Starburst Brooch

My grandmother used to sell Sarah Coventry door-to-door this is a piece from her personal collection. Never been worn. Has been stored in air-tight containers for years so has been gently cleaned & looked over to make sure everything is in original condition/working order. The center pearl has some wear from being stored in the original foam padded box, there is also some green foam padding stuck to the pin. Measures: 2 1/4"