🔎 UNIDENTIFIED Brass Plate

[Splash404]

Found in my Grandparents attic - They had it all wrapped up nicely with a few other items I will post another day.
No idea what the Symbols / Wording are from.... Anyone ever see one of these or something similar ?

 

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[Almy]

Well done with the clear pictures and the tape for size! Hopefully, someone will recognize it without any further information.