I think the person in charge of the hobby must have confirmed it Dale
I think most master type collectors of the 52 set consider it a variation, and some view it as involving more than one variation. Bob Lemke once wrote an SCD article suggesting it was a variation as opposed to a print defect, but I am not sure if it is listed as a variation in the most current Standard Catalog or Beckett. PSA usually follows what those catalogs list as variations eventually.
I have one all yellow and one yellow but with a red tongue
I would appreciate it if you could get someone to officially recognize my 52 Campos with the partially missing front border as a variation, like it's black star cousin.