Bruce: "The red boils are a mix of pure copper and lime, and are the remains of ancient BD. There is generally nothing under it, as it was formed from the bronze of the flan's matrix. It is, unfortunately best left alone. If you remove it, all you will have is a pit, or a very jagged flan surface."
Kontakt 
![Thessalonica in Macedonia, 210-217 AD., Caracalla, Æ 26, cf. Touratsoglou 25.
Thessalonica in Macedonia, Caracalla, 210-217 AD.,
Æ 26 (26-28 mm / 14,62 g),
Obv.: [AY K] M AYP AN-T[ΩN]IN[OC] , laureate and cuirassed bust of Caracalla right, seen from behind.
Rev.: ΘЄCCΑΛ - ΟÎΙΚ[ЄΩÎ] , Nike advancing left, holding kabeiros and palm.
cf. Touratsoglou 221, 25 ; SNG Cop. 414 .
Bruce: "The red boils are a mix of pure copper and lime, and are the remains of ancient BD. There is generally nothing under it, as it was formed from the bronze of the flan's matrix. It is, unfortunately best left alone. If you remove it, all you will have is a pit, or a very jagged flan surface."
Schlüsselwörter: Thessalonica Macedonia Macedon Caracalla Nike Kabeiros Palm](images/image.gif?id=1170539956594 "Klicken für Bild in voller Größe
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Thessalonica in Macedonia, 210-217 AD., Caracalla, Æ 26, cf. Touratsoglou 25.
Thessalonica in Macedonia, Caracalla, 210-217 AD.,
Æ 26 (26-28 mm / 14,62 g),
Obv.: [AY K] M AYP AN-T[ΩN]IN[OC] , laureate and cuirassed bust of Caracalla right, seen from behind.
Rev.: ΘЄCCΑΛ - ΟÎΙΚ[ЄΩÎ] , Nike advancing left, holding kabeiros and palm.
cf. Touratsoglou 221, 25 ; SNG Cop. 414 .
Bruce: \"The red boils are a mix of pure copper and lime, and are the remains of ancient BD. There is generally nothing under it, as it was formed from the bronze of the flan's matrix. It is, unfortunately best left alone. If you remove it, all you will have is a pit, or a very jagged flan surface.\"
Schlüsselwörter: Thessalonica Macedonia Macedon Caracalla Nike Kabeiros Palm")