Star of David marker's mark on a cup

[Fakir]

Hello,

I'm looking for informations about the silversmith that made this cup and whose mark would be a star of David.
I've thought at first that it could be Grimmer but as you can see there's nothing inside the star.

Every information would be helpful.

[dognose]

Hi,

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Trev.

[AG2012]

Hi,
Your image with the marks embedded.

Robert Altermann- Görlitz.
Jakob Grimminger Schwabisch Gmund
Although capital A or G within the star of David cannot be seen.
Take a look here:
https://www.925-1000.com/Fgerman_marks_a1884.html
https://www.925-1000.com/Fgerman_marks_a1884_3.html


Regards