Interesting Medallion, of Unknown Origin

[Vendric]

I think this is a 'Billy and Charlie' named after 2 enterprising 19th c. Characters who made and then discovered on the Thames foreshore pseudo mediaeval items. Note the date 1000, which would , had medals of that period been dated, have been in Roman numerals.
These fakes are now quite collectible in their own right.

Merry Christmas, Richard