Hi, ornamental fork, finial William & Mary (?). I believe it to be pseudo marks perhaps Dutch or German (Hanau style). The lion rampant facing right, pseudo standard mark, crowned G pseudo year letter. For German pseudo marks see;
https://www.925-1000.com/Fgerman_hanau_marks_01.html
Peter.
Source; Valse Zilvermerken in Nederland K.A. Citroen page 73 # 652