Vintage Plaster and Resin Giant Tridacna Clam Shell Centerpiece/Vide Poche

Faux giant Tridacna clam shell in cast/modeled plaster and resin (ca. 1940s/50s, USA).
Striking piece ideal as a functional serving/centerpiece or stand-alone charming object d’art with its impressive size and realistic detail.
There is natural patina and light wear present (few small flakes to the underside, as shown). Overall, very good, vintage condition.
Weighs 13 lbs and measures H: 7.75″ x L: 20.25″ x D: 16.75″