www.925-1000.com

Hello. Has anyone come across this brand and what material is it - silver?

If it is not a replication, than it is silver.

Is there a hallmark of Nürnberg (N) ?
Makersmark is IBM = Johann Berckmann (1691-1753)
ref. [GNM] Nr.57 MZ0057

Hello. Thank you very much Theoderich for your help, and I found a similar stamp from Rosenberg (No. 4272) Nuremberg. I asked the owner of the glass to look for the letter-(N).