Help with Scandinavian vintage silver necklace makers mark

Hi, I’m new here and hoping that someone could help me identify the maker of this vintage Scandinavian silver necklace (and any other info like age etc). I’ve been scouring the web with no luck! It does have quite an unusual clasp (see photo) Thank you!

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Norway.

Maker’s mark (CNLP?) - unidentified (it is not Tostrup).

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Hi, thank you for the info. Can I ask how do you know it’s Norwegian and not Danish? And what is Tostrup? Thanks.

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Tostrup - Norway Silver Maker’s Marks IV - at 925-1000.com, marks found on antique, vintage & collectible Norwegian silver.

830S and other marks - www.925-1000.com

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