Watch List notes:

The Roman Empire
Pertinax, 1st January – 28 March 193

Portraits of Pertinax are known with different lengths of his beard, but no objectively different portrait types seem to exist based on any other criteria. AMP.

Denarius 193, AR 2.93 g. IMP CAES P HELV – PERTIN AVG Laureate head r. Rev. VOT DECEN TR P COS II Pertinax, veiled, standing l. and sacrificing out of patera over altar. C 56. BMC 24. RIC 13a.
Rare. Unobtrusive flan crack at one o'clock on obverse, otherwise good very fine