Gallic Empire Postumus Silver Antoninianus RIC V Postumus 58

Monetary Context and the Gallic Currency System

The radiate coinage classified as RIC V Postumus 58 reflects the critical monetary divergence that characterized the Western provinces during the mid-third century AD. Following the capture of Emperor Valerian by the Sasanian Empire in AD 260, Roman authority fractured. Postumus, commanding the Rhine frontier, revolted against Gallienus and established the autonomous Gallic Empire, encompassing Gaul, Britain, and portions of Hispania. In Rome and Milan, Gallienus struggled with catastrophic economic strain, precipitating severe hyper-debasement of the antoninianus, which plunged from roughly twenty percent silver down to mere copper washes containing less than five percent precious metal. In contrast, Postumus made the deliberate strategic choice to issue radiates with substantially higher silver content, typically ranging between fifteen and twenty-five percent early in his reign, struck on broader and heavier flans that averaged between 3.0 and 3.6 grams. By backing his currency with superior intrinsic value, Postumus stabilized regional trade and sustained the loyalty of the Rhine legions. RIC V Postumus 58 was an integral component of this early monetary restoration, using traditional imperial iconography to communicate fiscal credibility and administrative legitimacy to both soldiers and civilians.

Production Standards and Mint Attribution

In the foundational volume of The Roman Imperial Coinage (RIC V.2), Percy H. Webb assigned RIC Postumus 58 to the mint of Lugdunum (modern Lyon), following the conventional arrangements established by nineteenth-century numismatists. While Lugdunum was long presumed to be Postumus's initial administrative mint, later twentieth-century scholarship, initiated by Georg Elmer in 1941, proposed that Postumus established his primary mint at Colonia Claudia Ara Agrippinensium (Cologne), closer to the northern frontier, before production shifted under subsequent rulers to Augusta Treverorum (Trier). Modern authorities, including Jerome Mairat, continue to analyze whether the primary workshop operated at Cologne, Trier, or Lyon during the first emission phase, though many general databases retain the legacy Lugdunum attribution found in RIC. Production utilized multiple pairs of dies executed in high relief, characterized by fine die engraving that was notably superior to contemporary central imperial issues. Radiate flans for RIC 58 were prepared with careful attention to roundness and weight consistency, although variations in alloy mixture and flan cooling occasionally produced micro-porosity and brittle silver surfaces typical of third-century debased billon.

Obverse Portraiture and Typological Variations

The obverse of RIC V Postumus 58 features a commanding right-facing bust of the emperor wearing a radiate crown, the classic indicator of the double-denarius denomination. In accordance with the official type definition, the bust appears in two attested drapery varieties: radiate and draped, or radiate, draped, and cuirassed. Postumus is rendered with a prominent, mature facial profile, a heavy jaw, and an expertly delineated short, curly beard and trimmed mustache. This realistic, dignified portraiture deliberately evoked traditional Antonine and Severan models, distancing Postumus from the rapidly stylized and rushed engravings produced at the central mints of Gallienus. The radiate crown is rendered with sharply pointed rays projecting outward, positioned neatly above the hairline. Minor die variations exist across the series, showing differences in the angle of the bust, the fullness of the military cuirass, and the drapery folds over the shoulder, though the essential compositional elements remain standardized across the workshop dies.

Reverse Iconography of Felicitas

The reverse design depicts Felicitas, the Roman personification of good fortune, happiness, and prosperity, standing draped and facing left. In her right hand, she holds an upright winged caduceus, a classical attribute associated with peaceful commerce, successful negotiation, and divine protection. In her left arm, she cradles a cornucopiae, the horn of plenty overflowing with agricultural abundance, which symbolized sustained material wealth and stability for the realm. Felicitas is clothed in a long stola falling to her feet, often rendered with graceful drapery folds that reflect careful die carving. The composition embodies standard Roman imperial ideology, assuring subjects that the emergence of the Gallic Empire was marked by divine favor and tangible domestic tranquility. Unlike some later Gallic reverse types that emphasize overt military coercion or specific defensive battles, the iconography of RIC 58 focuses on the peaceful fruits of legitimate rule, presenting the regime as a flourishing haven apart from the crises afflicting the rest of the Mediterranean world.

Inscriptions and Epigraphic Analysis

The obverse inscription reads IMP C POSTVMVS P F AVG, an abbreviation of the Latin formula Imperator Caesar Postumus Pius Felix Augustus. The title Imperator Caesar establishes his supreme military command and imperial status, while the customary epithets Pius (dutiful or pious) and Felix (fortunate or blessed) emphasize traditional civic virtues and divine endorsement, culminating in the supreme titular Augustus. The lettering is cleanly cut and regularly spaced around the outer circumference of the flan, beginning at the lower left and continuing over the crown to the lower right. The reverse bears the legend FELICITAS AVG, abbreviating Felicitas Augusti, meaning the Felicity of the Emperor. This legend explicitly ties the concept of collective prosperity and fortune directly to the person and reign of Postumus, asserting that the wellbeing of the Gallic provinces emanated from his virtuous leadership. Unlike later issues of the Gallic Empire that featured control marks, officina letters, or mint signatures in the exergue or fields, RIC 58 exhibits completely clear fields on the reverse, with no officina numerals or mint letters present.

Typology and Chronological Placement

Within the broad framework of RIC V, Postumus's coinage is catalogued across his entire reign from AD 260 to 269 without intricate internal sub-phases. However, comprehensive hoard studies and die-link analyses, notably by Georg Elmer in 1941 and later refined by Edward Besly and Roger Bland in their study of the Cunetio hoard (1983), have refined the sequence. RIC Postumus 58 is placed within the early emissions of the Gallic Empire, dated between AD 260 and 262. It belongs to Elmer's Emission 1 or 2, struck before the steady debasement that began to affect Postumus's silver coinage after AD 265. The absence of field marks and the exceptional weight and style place this type alongside other early introductory radiates featuring personifications like Victoria, Pax, and Salus. Chronologically, the type was replaced or supplemented in later emissions by types featuring more varied reverse slogans or military personifications, making RIC 58 a benchmark for the baseline weight standard and portrait style of the nascent Gallic administration.

Hoard Evidence and Regional Circulation

Radiates of RIC V Postumus 58 circulated predominantly within the northwestern provinces under Postumus's control, with heavy concentrations found throughout Roman Britain, northern Gaul, and the Rhineland. Substantial quantities have been documented in major British coin hoards, including the Cunetio hoard of Wiltshire, the Normanby hoard of Lincolnshire, and the Blackmoor hoard of Hampshire. On the European mainland, specimens occur regularly in French and German frontier deposits buried during the volatile decades of the late third century AD. Because Postumus's early radiates carried a higher silver content than the contemporary central issues of Gallienus, they were frequently hoarded by the populace in accordance with Gresham's law, while the lower-grade central Roman antoniniani remained in daily transactional circulation. Nevertheless, worn specimens of RIC 58 also appear in later context hoards buried after the collapse of the Gallic Empire in AD 274, demonstrating that despite progressive debasements under Victorinus and Tetricus I, early Postumus radiates continued to change hands for more than a decade after their initial striking.

References

1. The Cunetio Treasure: Roman Coinage of the Third Century AD. British Museum Publications, London
2. The Normanby Hoard and Other Roman Coin Hoards. Coin Hoards from Roman Britain, Vol. VIII
3. Die Münzprägung der gallischen Kaiser in Köln, Trier und Mailand. Bonner Jahrbücher 146, pp. 1-106
4. The Coinage of the Gallic Empire. Doctoral thesis, University of Oxford
5. Online Coins of the Roman Empire: RIC V Postumus 58. ric.5.post.58
6. The Roman Imperial Coinage, Volume V, Part II: Probus to Diocletian and the Gallic and British Empires. p. 341, no. 58