Watch List notes:

Septimius Severus (193-211), Denarius, Rome, AD 209; AR (g 3,05; mm 21; h 6); SEVERVS - PIVS AVG, laureate head r., Rv. P M TR P XVII - COS III P P, Neptune standing l., r. foot on globe, holding trident. RIC 228; C 529.
Dark patina, about fdc.