From the Sleaford Standard (more at the link):
Among the artefacts, a rare complete Viking brooch, dating back to 850-950 AD, was found near Sleaford.
Most objects found copy Viking styles, but this one is likely to have originated from Scandinavia. It is feasible that the brooch arrived via the ancient port of Saltfleetby, near Louth. It is decorated with ring and dot markings and on each wing is a leaf motif, which may symbolise the tree of life.
More than 5,000 artefacts were discovered in the county in 2012, a figure just revealed under the British Museum’s Portable Antiquities Scheme, supported by Lincolnshire County Council, to help build an understanding of the past.