Æ 25 - Commodus with countermark 'KA' ΑΔΡ ΠΕΤΡΑ ΜΗΤΡΟΠΟΛ

Petra held the title of metropolis under Roman provincial administration, and this issue falls within Commodus's co-reign with Marcus Aurelius before the latter's death in 180 — a period when civic minting in Arabia Petraea was consolidating around a handful of active centers. The countermark 'KA' punched into the flan is a revalidation mark, applied almost certainly by a local authority to extend the coin's currency, a practice well-documented across eastern provincial bronzes when fresh supply was interrupted or insufficient.

Spijkerman's 24a designation places this among the rarer attested die pairings for Petraean civic bronzes of the Antonine period.