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Welcome to the forum. The trademark on your spoon looks like one that was used by International. The issue date for the pattern might give a rough idea of when your spoon was being sold, but at least for myself, a full image of the handle will be necessary to attempt an identification.
Oops! I just noticed the complete handle is viewable. The pattern looks like it is LaRochelle which was issued in 1909. I cannot tell you when production stopped, but hopefully, someone else can.