Antique Victorian Biedermeier Silver

I’m in the possession of 29 Antique Victorian Biedermeier silver cake forks and tea spoons. As far as observed it has a high silver content. They are soft and vulnerable.
I want to find the origin based on the silvermarks.
The fork set has a mark that looks like J.R
the spoon set has a mark consisting of 2 stars like **
Who can identify them?
Please email me, serious emails will be answered

No e-mails or private messages please. MCHB, please post a picture of the marks.