Hi, just purchased my first russian piece for my collection and I'm having some difficulty with the marks, they are rubbed in a few areas, the assay mark I believe is Nikolau Dubrovnik going by what looks like a 1839 date, but I'm at a dead end with the makers mark, so now I'm think it may be a fake, the niello looks ok being that it's not painted and has been engraved first, so any opinions would be gratefully received.
Regards
Mark.
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