From what I understand (i.e., remember reading), Danzig started requiring assayers' marks to be put on silver items around 1730.
I believe this object to be very late XVIII c. to early XIX. Assuming that the "R" in a square is an assayer's mark, the closest match is in Rosenberg (1829-33, 36). Most likely, this is it, but it is still NOT the same mark. Clearly, Rosenberg's "R" is in Italic, this one is not.
In my previous post I misspelled a name of a reference I was using. It should be Gradowski's and not Grodecki. The book is "Zlotnicy na ziemiach polnocnej Polski" by Michal Gradowski and Agnieszka Kasprzak-Miler. (translation "Goldsmiths of Northern Poland").
Anyhow, here is a picture of the object. Filigree confiturier with 12 filigree spoons.
