Here is a charming necklace by the lesser known Norwegian silversmith Harry Pedersen, whose logo was registered in Bergen from 1967. It comprises 7 links + chain, incorporating 2 different designs, each with intricate guilloche patterning under the white enamel and finished with gold detail. I've never seen this item before.
Condition: Excellent, no visible damage
Marks: 925S Conjoined HP in rectangle logo,
Size: Total length is 16" (40cm), lying , but maybe a trifle longer around the neck. Central section is 6.5" (16.5cm)