Thracia, Topiros, Caracalla, Varbanov 2683 (A strange incus)

Caracalla, AD 198-217
AE 27, 16.95g, 27.38mm, 210°
struck AD 211, (between death of Severus AD 211 and the murder of Geta on Dec. 211 or Feb. 212)
obv. AVT KM AVRH ANTWNINOC
Head, bearded, laureate, r.
c/m circular incus with AVR as monogram
rev. OVLPI - AC TOPI / ROV
Tetrastyle temple, columns with cannelures, trigonal roof without entablature; empty intercolumnaria; on each side a low base with a horseman raising r. hand
ref. Varbanov (engl.) 2682
extremely rare, EF, probably the most beautiful coin of Topiros, a rare city in Thracia.

This countermark is found on other coins of Domna, Caracalla and Geta too. Not in Howgego. Actually it is not a real countermark, because it was engraved into the original die before (see coll. H.Agndal at FAC!).
Ulrike Peter: This incus possibly means any imperial privileges.

Topiros was situated some miles north of Abdera at the river Nestos.