River Witham sword

A medieval sword on display in the Magna Carta exhibition at the British Library 2015.
It was found in the River Witham in July 1825, and was later presented to the Royal Archaeological Institute.
It has an undeciphered inscription on it - +NDXOXCHWDRGHDXORVI+[.
Details here.
The Wikipedia entry is and on sword inscriptions is . 
There are various other websites on the topic, eg the British Library page [blogs.bl.uk/digitisedmanuscripts/2015/08/help-us-decipher-this-inscription.html here].
Category:Undeciphered inscriptions
Category:Middle Ages