Founder: Jacob Tostrup
- Decorative Arts & Enamel Jewelry
- Produced traditional Norwegian folk filigree silver jewelry.
- Oluf Tostrup developed Champlevé and Plique-à -Jour enamel for the firm.
- Torolf Prytz, architect was the production manager & designer of award-winning boxes and cups.
- Jacob Prytz (son of Torolf Prytz & Hilda Tostrup) took over the firm.
- Grete Prytz became the designer.