Your spoon is Swedish. I3 means that it was made in 1815 so it is not as old as you expected. http://www.925-1000.com/Fsweden_Date_Code.html
Maker is Anders Petter Ekedahl - the l is not visibel at your spool it has been worn off.
Ekedehl was master 1808 to 1823 in EksjÃ¶ he was born 1780 and became master October 24th 1808. and he died October 26th 1823.
When you come to NÃ¤ssjÃ¶ go to the church and see a "kalk"(is it cup in english?) made 1810 and he also made liquercups 1810 and a spoon 1813 - these are the registred work of him.
Look for that location - it might be nice if you find family.