Dansk Silver has dated this piece to the 1960s.
Most of this modernist style is from the 1960s.

This stylish pendant with it's cabochon onyx is 4.5cm long x 2.6cm wide. Silver chain by another maker is 46cm long. Total weight 11.1g. Excellent condition. Any light reflection on the onyx is from the camera. Matching bracelet and ring listed separately, please see last picture.
Dansk Silver has dated this piece to the 1960s.
Specialising in georg jensen and other scandinavian silver jewellery
You can view the stock and full dealer information on the Dansk Silver Profile Page