The pendant is very similar to six found in the Vårby hoard found in the Mälaren valley of central Sweden and dated to about 940, with further very close parallels coming from Birka (also in Sweden) and from Norway.
more info - https://research.britishmuseum.org/research/collection_online/collection_object_details.aspx?assetId=1255002001&objectId=1399019&partId=1

Small pendant:
Metal: 925 silver
Weight: approx. 13 g ( 0,46 oz)
Diameter: 30 mm (1.18 inch)
two-sided pendant

Medium pendant:
Metal: 925 silver
Weight: approx. 20 g ( 0,7 oz)
Diameter: 35 mm (1.37 inch)
two-sided pendant

Large pendant:
Metal: 925 silver
Weight: approx. 37 g (1,29 oz)
Diameter: 40 mm (1.57 inch)
two-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...