The Reese is exactly that: a recurring print flaw that affects a small portion of black ink including and surrounding the position on front. There is no Reese that isn't missing the surrounding black ink, just his position. It was added to the guides a long time ago and has stuck since.
There also exists a 3rd type that has a very faint trace of black ink in the same missing print area (you can see a ghost of the S position).
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