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Trajan Decius (249-251). AE Semis, Rome mint. Obv. IMP C M Q TRAIANVS DECIVS AVG. Laureate and cuirassed bust right. Rev. SC. Mars standing left, holding shield set on ground and spear. RIC IV 128; C. 102. 3.07 g. 17.00 mm. R. Rare. Superb portrait. Nice olive green patina, with earthen deposits and turquoise spots. Good VF.