This is a vintage pair graduated climber style Japanese saltwater akoya cultured pearl screwback earrings.

The pearls measure from 3.50-4.75mm. They have good luster with very light rosy pink overtones and white color. 

They are stamped "STERLING" for sterling silver. The earrings measure 1 1/8 inch long. From mid-century.

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