E1813 is likely a model number or something like that, it is unlikely that it is a date. I don't know a lot about silverware, but did some research here lately, and here is what I found. If its sterling it should be marked as such. If not marked, odds are very high that its plate. Plate generally has little value, even though there are some beautiful plated pieces. So first of all, ascertain whether its plate or sterling.