Trajan Decius (249-251). AE Semis, Rome mint, 249-251 AD. D/ IMP C M Q [TRAIANVS DECI]VS AVG. Laureate and cuirassed bust right. R/ SC. Mars standing left, holding shield set on ground and spear. RIC IV 128. 3.68 g. 19 mm. R. Rare denomination and choice example. Attractive green patina. EF.
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