Great rod.If the weight figure has "ounces" or "oz" immediately after the number then it's going to be the mass weight of the finished rod. The "weight in hand" if you will. Which is different than the "weight" of the line that it is meant to cast (which I'm guessing is what you mean by the "taper").
Here's an example of a Sage rod marking, it shows the mass weight of 4 5/16 oz and it is a 7 weight rod.
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Do you have a photo of the labeling on the rod in question? That would help us to de-cipher it.