Welcome to the forum with your question.
I’m inexperienced in Swedish marks and I haven’t any guide for Scandinavian marks.
I’ve looked here: http://www.925-1000.com/Fsweden_Date_Code.html
If I interpret correct, than is in your example missing the Â»3 crownÂ« state symbol for Sweden.
From left to right:
Fineness mark in letters Â»STERLINGÂ« = 925/1.000
Maybe town mark for King’s capital = Stockholm
Fineness mark = 925/1.000
Date mark Â»E10Â« = 1979 (= 10th cycle of Year letters)
Maybe maker’s mark Â»A3Â« or Â»ADÂ«?
Let’s wait only a little while until the experts for Scandinavian objects getting notice of this; because you’ve placed your question totally wrong under Â»American after 1860Â«.
An advice of me: Take a little time before you place your quest — and make some search before e.g. in: http://www.925-1000.com/foreign_marks.html
Kind regards silverport