Antique Pearl & Diamond Pendant Necklace

Centering a button shaped pearl measuring approx. 6.5mm., additionally set with Old European & Swiss cut diamonds weighing approx. 0.42ctw., suspending three pearl drops 8 x 5.5 - 8.7 x 5.65 mm. on a pearl single strand measuring approx. 2.6mm., and a clasp set with seven Single cut diamonds weighing approx. 0.10ctw., fashioned in platinum & gold. Stamped "B.B.&B. for Bailey Banks & Biddle. Length 15 inches.