This is a cute vintage Japanese akoya saltwater cultured pearl leaf pin by Harry S. Bick.

If features one pearl and a delicately detailed dogwood motif. The pearl measures 3.25mm and has fantastic luster with rosy overtones. 

It is in solid sterling silver and is stamped "STERLING" and "HSB". It measures 1 1/8 inch across. 

All pearls are truly vintage and have only been lightly cleaned.