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The semis (“SEH-miss”) coin was worth half of an as, and was first made in 280 BC. After the Roman Republic came to an end, the semis was continued into the Roman Empire. However, it was never a regularly-issued coin, and the production of semisses ended with the reign of Hadrian (117 — 138 AD).
Note that the translation for semis in Italian is semisse; look for that term in sales listings which may include Italian-speaking sellers.
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TRAJAN DECIUS Authentic Ancient QUADRANS As or SEMIS Roman Coin MARS i85642
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VESPASIAN, 69-79 AD. AE SEMIS. ROME MINT. CROSSED CORNUCOPIAS REVERSE.
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Hadrian 117-138 AD, Roman Empire Bronze AE Semis Caesar Zeus Rome Coin, NGC VF
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NGC Very Rare 27BC-14AD Irippo Augustus Female Seated Graded VF Coin Roman
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ROMAN EMPIRE. Titus, AD 79-81. Æ Semis, IVD CAP, Judaea Capta, NGC VG
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Trajan 98-117AD AE Semis. Rome for Syrian Circulation
$227.30
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(1st c. BC) Roman Spain - AE Semis of Castulo, NGC Ch VF.
$374.95
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Early 1st Century BC Celtic Spain Castulo AE 1/2 Unit Semis Bull & Apollo Coin
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SPAIN, CASTULO. AE SEMIS. CIRCA 2nd CENTURY BC. BULL REVERSE.
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BRONZE SEMIS, HADRIAN, 117-138 AD. ROME MINT, C. 125-128 AD. ROMA REVERSE. RARE.
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