Watch List notes:

Pertinax. 193 AD. Denarius, 3.20g (0h). Rome. Obv: [I]MP[ ]CAES P HELV - PERTIN AVG Head laureate right. Rx: PROVID - DEOR COS II The Human Race standing left, raising both forearms towards star in field. BM 13. Cohen 43 (50 Fr.). RIC 11a (R2). Strong portrait. EF

The reverse type suggests that the gods sent a star to presage Pertinax' accession, apparently a reference to a comet which appeared late in Commodus' reign according to Herodian