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Huh, well, that's different. I think I've only got one Dubl Duck hone but I'm pretty sure that mine and others that I've seen have an actual molded imprint on the face of the hone. I've never seen...

Does the hone imprint say Dubl Duck? You'd be surprised at the number of hones in boxes that don't match.
Some hones do in fact produce a finer finish when used dry, so go ahead and experiment...