Since there was no known method to control the disease
Corrosion)
SECURITAS PUBLICA likely refers to the enhanced security of the Roman Empire & Roman citizens provided by the Severan Dynasty
Struck for Guanajuato State only two years
Last issue of four year type
330 Constantine I Great Follis Heraclea XF Soldiers Standards Spears (23121307R) Crown Since there was no knownExtremely Fine Constantine I 'the Great' bronze follis coin. Struck ~330 335 CE at the Heraclea Mint, mint mark SMHA. Bronze, 17 mm, 2. 25g, Heraclea mint. Obverse: CONSTANTINVS MAX AVG, rosette diademed, draped, and cuirassed bust of Constantine I right. Reverse: GLORIA EXERCITVS, two soldiers, holding spears and shields, standing facing, two standards between them.