This mark is Frigast a maker early in 20th Century.
His mark is often confuses with The guardein Fabritius mark.http://www.925-1000.com/dm_Assay.html
And the idea of hawing a 20th Century piece and not a piece made between 1787 to 1823
Its not froad its just a similar mark. Frigast never intended to be mistaken for Fabritius. But are you not familiar then you could be confused.