Please help me identify silversmith of the cruet

[elcid51]

Please help me identify silversmith (I.G) of the cruet.
Thanks,
Guido

[elcid51]

Hi,
I think I can say that the cruet was made in the city of Cambrai in 1788 (see attached photos) but the silversmith I.G is still unknown. Can anyone help me identify it.
Thank you, greetings,
Guido