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It is one of just 10 coins of Ludeca known and the only one with a London mint mark (the others were struck by moneyers in East Anglia).

The coin helped to rewrite Anglo-Saxon history as it demonstrates that the Mercians continued to hold London throughout the 820s, and that the city was not captured by Ecgberht, king of Wessex, until at least after Ludica’s death in 827.

A unique coin, it was offered by Dix Noonan Webb on March 10 and sold at £32,000 (estimate £10,000-15,000).

The buyer's premium was 24%.