Hallmark unrecognised- help please

Small rectangle snuff/pill box that I can’t identify any of the hallmarks on. Anyone help please?
I have tried to take photos but they are not exceptional. Hope it’s enough for someone to help. Thank you.

It’s a London import mark with the date letter Q for 1990. The sponsor/importer GGLd is not known to me.

Phil

Many thanks for the information and quick reply.