The British perspective on this is really the Portable Antquities Scheme at https://finds.org.uk/ https://finds.org.uk/ which has been running for over 20 years

The British perspective on this is really the Portable Antquities Scheme at https://finds.org.uk/ https://finds.org.uk/ which has been running for over 20 years. You'll find details of research papers and the Staffordshire Hoard, probably one of the largest collections of Anglo-Saxon metalwork ever found https://en.wikipedia.org/wiki/Staffordshire_Hoard https://en.wikipedia.org/wiki/Staffordshire_Hoard