This particular CPV does not seem to have been documented previously. The most probable source of this CPV is either Plate 3 or Plate 4, although its exact position has not yet been established. It is worth noting that the flaw in question is not evident on the plate proofs, indicating that the plate damage must have occurred later. Determining the plate position may pose a challenge. It is also worth noting that no examples of this CPV were found in the Marler collection.