This fragmentary copper-alloy strap-end is decorated with openwork zoomorphic design in the Urnes style. It has been classified as a Thomas Class G strap-end.
You can see the original at
(c) Portable Antiquities Scheme, CC BY-SA 4.0
Portable Antiquities Scheme
Thomas, Gabor. “A survey of late Anglo-Saxon and Viking-Age strap-ends from Britain.” PhD diss., University of London, 2000.