One of collecting themes is the eastern mint denarii of Septimius Severus. I primarily concentrate on the earlier issues but sometimes wander into the later issues though they are not my primary focus. Some years ago I obtained a few coins from the "L SEP SEVERVS PER AVG P M IMP XI" issue particularly with the "PAR AR AD ....." legends, which commemorate the victory over the Parthians.
Some years ago I became aware of the existence of an odd variant of these coins with the unusual obverse legend "L SEP SEVERVS PER AVG PIV IMP XI PAR P M" after Curtis Clay illustrated an example of this rare type that he had obtained. These became added to my very long "wish list" of coins to keep an eye open for.
I have managed to obtain three different examples from this rare issue that I thought it worth sharing. All three coins share the same obverse die which is different to the only other example from this issue that I have seen.
All three coins would appear to be rare with the only examples know to RIC or BMCRE being misread coins from the RD Hoard.
Septimius Severus denarius
Obv:â€" L SEP SEVERVS PER AVG PIV IMP XI PAR P M, laureate head right
Rev:â€" AR AD [T]R P VI COS II P P, Victory walking left, holding wreath in right hand, palm in left
Eastern mint. A.D. 198
Reference:â€" BMCRE page 280 *, citing RD page 105. RIC 494a corr.

Septimius Severus denarius
Obv:â€" L SEP SEVERVS PER AVG PIV IMP XI PAR P M, laureate head right
Rev:â€" AR AD TR P VI / COS II P P, Two captives seated back to back at the foot of a trophy
Eastern mint. A.D. 198
Reference:â€" BMCRE page 280 Sword, citing RD page 105. RIC 494b corr.
Slightly double struck on the reverse.

Obv:â€" L SEP SEVERVS PER AVG PIV IMP XI PAR P M, laureate head right
Rev:â€" SALVTI AVGG, Salus seated left feeding snake coiled around altar
Eastern mint. A.D. 198
Reference:â€" BMCRE page 281 Note, citing RD page 102. RIC 497b corr.
Holed and worn but with enough detail to determine the die match to the other two coins illustrated here.

Regards,
Martin