best guesses?
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These are Swedish hallmarks. The three crowns and trefoil symbols are the national control mark. The S indicates that it’s at least .800 silver, though it might be higher. The L9 is the date code for 1961. Haven’t found the maker yet.
ETA:
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(Wrong guess on the maker deleted, so as not to pollute future searches! I think Bart’s got it right.)
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Thank You, Jeff! --------------------------- 
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