Based on Base Plate of Drum Brooch, Tandgarve, Sweden.

Metal: 925 silver
Weight: 16 g (056 oz)
Size: 35 mm (1.37 inch)
One-sided pendant

Chain not come with the pendant.

Fit chains:

1. Photo chain (medium weight) - https://berloga-workshop.com/catalog/67...

2. Medium sized chain - https://berloga-workshop.com/catalog/24-viking-ch...

3. Medium sized chain - https://berloga-workshop.com/catalog/456-viking-ch...

4. Medium sized chain - https://berloga-workshop.com/catalog/68-sterling-sil...

Black Sun Symbol origin -  https://en.wikipedia.org/wiki/File:SchwarzeSonneArtifacts.JPG - decorative brooch found in Inzing, Innsbruck-Land, dated to ca. AD 400, from Hermann Wirth, Die heilige Urschrift der Menschheit, Leipzig 1936, BD. II, Bilderatlas, Tafel 42 (at the time kept in the Staatl. Museen Berlin.)