Can you please help me to identify this French hallmarks

[dk11]

Hello,

Can someone help me to identify this french hallmarks, please, any help would be very useful.

Thank you very much!

[zilverik]

Hello,

1777-1780 Lille for the period of Delehaye, Cattaert, Prevost till june 6, 1780
Maker: Ricourt Francois-Joseph (1744-1809)
See Cahiers du Patrimoine, les orfevres de Lille 1

Regards,

Zilverik