There is a 1756 jeton with Louis XV bust, which was issued to commemorate the completion of work carried out on the colonnades / frontage of the palace of Versailles in that year.
Perhaps it was issued again to commemorate further work conducted under Louis XVI . If so, it is understandable that the earlier reverse dies were simply reused. However I would have thought they would have obliterated the date (as has been done with similar reusing of the same dies at a later date).
