Hi Betti -
your spoon was made by the Polish silversmith P. Latkowski in Warszaw - as you might know Poland was at a certain time under Russian rule (History!). This is the reason of the Kokoshnik mark - left from the head is the number 84 = 84 Zolotniki, the Russian legal silver content (875/1000).

Source: private file of Polish silversmiths in Warszaw
Regards
Zolotnik