"The Vikings of York (Jorvik) issued their own distinctive coins. This coin Christian in character, commemorates St Peter, the patron of York's cathedral and is known as St. Peter Coinage. It also celebrates the traditional Norse gods with the hammer of Thor and sword design." - Source: http://dorchesters.com/vikings-at-y...eter-coinage
Such coins have been replicated, but I haven't found any looking like yours.