Thank you for showing this real1y unusual piece, Roy - the pressing appears to really good quality.
To add a few details:
Registered design number 328349; registered 26 October 1878 - Parcel 14;
Registrant: Oscar Braumuller, 21 Hamsell Street, Falcon Square, London.
Subject: A plate. Class 3: glass.
The 1881 census shows Oscar Braumuller (general merchant, aged 40, born in Germany) to be living at 60 Charlotte Street, Marylebone with his wife, Louise (aged 29, born in New Holland, Lincs.).
This plate seems to have been Braumuller’s only design registration in glass.
Fred.