Addition known silversmith

[Mareharzing]

Hi, I was looking at a silversmith from Russia, named Labecki.
It said on the site he worked from 1881-1889. But I found his makersmark in combination with earlier stamps. The assay mark is: o.c 1872 from warsaw. (Jozef Sosnkowski) and the eagle from Warsaw. There is also a stamp 84.
Does this mean that Labecki's known period of work could be extended?
I have pictures of the stamps.

Like to know,
Mare
Haarlemsche zilversmederij

[dognose]

Hi Mare,

Welcome to the Forum.

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Trev.

[Qrt.S]

Interesting. Show the mark as requested thank you!