1953 5 Cent Zoell # P185q

Zoell's "editions" changed, via content, from when he started to where he ended in the 60's. At first, he had both minor and major varieties in one book. I think with the 3rd or 4th editions, he had split the major and minor anomalies and assigned new, different Zoell #'s. Once that happened, the "major" varieties took off much faster than the minor errors. A "major" variety was a coin that was changed by the mint, with good palanchets, good undamaged dies, proper pressure, and good machinery & adjustments. Yours, with a die chip or DD is an error, not a variety.