I have this standing cup that was presented in 1867, and the accompanying description of the cup at that time referred to it as an "Antique Silver Cup". Given that the presenters were in the antique trade they must have known that to qualify as an antique an object has to be over 100 years old.
I have checked a number of on-line sites, and I thought that the crossed keys resembled the Riga regions and the lion mark was similar to the Brunswick region of Germany. The maker's mark might be CB or GB, perhaps on of the Brenners.
I greatly appreciate your expert opinion as always.
Kind regards,
Fred

