This is a lovely vintage Japanese akoya saltwater cultured pearl lily pin by Van Dell

It features three lustrous pearls set among delicately detailed petals. The pearls measure 4.50-5.25mm. The two smaller pearls are post set and the largest spins freely on a bar. They are set into a brushed lily design.

It is in solid sterling silver and is stamped "STERLING" and "Van Dell". Van Dell was founded in the 1930's and was known for their jewelry for decades. They were later purchased by Krementz and is still in production today. It measures 1 1/2 inch across. 

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