St. Petersburg spoon

[Scotrab]

Could please someone identify the maker of this 1876 St. Petersburg engraved spoon?
I have only P-L as reference and it indicates the assay master PK as unknown. It has no entry for the maker EE in cyrillic. For EE in latin it has two entries, Erik Enqvist and Elias Enckenberg, both too early, and the marks are not quite the same.
Thank you very much in advance for your help.

[Hose_dk]

What does the engraving say?

[Scotrab]

F. C. Schneider 1876

[Qrt.S]

The name of the assayer П·К is Kostytshev, Pavel Andrejevitch. He assayed in St Petersburg 1873-1876. Unfortunately the maker is unknown to me.

[Scotrab]

Thank you very much!
Perhaps someone knows the maker...