Corvidae Antique has dated this piece to the 1950s.

Marked D-A NORWAY STERLING 925S.
In excellent vintage condition with no damage at all to the enamel and a secure spring ring clasp.
Length: 7 and a quarter inches (18.5cm) x 1cm.
Weight: 11.9g.
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Corvidae Antique has dated this piece to the 1950s.
Hand picked jewellery from a friendly family business
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