Silver jewelry in 925s or 830s David Andersen, Efva Attling and Tone Vigeland.

Stamped: ND, Sterling, TV, Norway, Plus
Tone Vigeland, Plus Fredrikstad for Norway Designs

"Slip" - Formulated 1958.

Inner dimensions: approx. 6.0 cm in diameter

Tone Vigeland is an internationally renowned jewellery artist.