if you are referring to the color of the ink, I've seen this before but I think it's more an issue of production quality then a desirable error. Maybe as a novelty it's worth five or $10.
📋 Item Submitted
Serial number ink error
M
Marc's Expert Appraisal
ANA-Certified Numismatist · Hudson Valley Numismatics
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I think you mean 1893. Worth about $6-8 in good.
Plus I have cups and saucers for a serving 18.
There is very little value in most china. We would need to know the date and patten.