thanks for the tip, but I have neither seen an Osnabrueck-mark on this place (end of the handle) nore a tremulierstich. So I don`t think that this is an Osnabrueck mark.
here is an example from Osnabrueck from the same time:
thanks. I know him, Scheffler mentioned this Goldsmith. Since 1822 he was back in Germany and worked in Brunswick. He became master in 1804. That is to late. Furthermore St. Petersburg mark is different (round). So I dont think, that he has made the spoon.