Postumus Silver Antoninianus RIC V Postumus 83

Monetary Context and the Gallic Currency System

The appearance of the billon antoninianus catalogued as RIC V Postumus 83 belongs to the complex monetary crisis that engulfed the Roman world during the mid third century AD. Following the capture of Emperor Valerian by the Sasanian Persians in 260 AD, Roman authority splintered. Postumus seized command of the Rhine legions and established an independent administration encompassing Gaul, Britain, and temporarily Hispania. Crucial to the survival and legitimacy of this Gallic Empire was an independent fiscal and monetary infrastructure capable of paying Rhine frontier garrisons and civil officials. At the accession of Postumus, the official antoninianus produced at Rome under Gallienus was undergoing severe debasement, rapidly plummeting toward a negligible silver content below ten percent. In stark contrast, Postumus initiated a conservative monetary policy, deliberately striking antoniniani of comparatively elevated weight and silver purity. During the first half of his reign, Gallic billon coins often contained fifteen to twenty percent silver, maintaining greater physical integrity and public confidence. Although ongoing financial strain gradually compelled Postumus to reduce the purity of his antoniniani during his later emissions, issues bearing the reverse SAECVLI FELICITAS preserved a perceptible standard superior to the contemporary base metal radiates of Rome. The issue thus performed a dual function: it served as dependable specie across commercial networks in Gaul and Britain, and it operated as ideological propaganda affirming the stability of the Western realm against the chaos elsewhere in the Mediterranean.

Production Standards, Metallurgy, and Mint Attribution

The technical manufacture of RIC V Postumus 83 illustrates the sophisticated operation of the Gallic imperial mints. In the original classification of Percy H. Webb in Roman Imperial Coinage Volume V, Part II, Postumus 83 was assigned without reservation to Lugdunum. Webb followed earlier nineteenth-century numismatic traditions that viewed Lyon as the premier mint of Roman Gaul. However, mid-twentieth-century die studies and typological analyses, initiated prominently by Georg Elmer, challenged this assumption. Elmer reassigned the majority of Postumus's primary output to Cologne (Colonia Claudia Ara Agrippinensium), where Postumus established his administrative capital, while noting possible operations at Trier (Augusta Treverorum). Contemporary research led by Jerome Mairat, Roger Bland, and Dominique Hollard demonstrates that while Cologne likely served as the primary mint for much of the reign, Lugdunum was re-established or maintained as an active operational mint at distinct periods, with some scholars favoring a single principal mobile mint accompanying the imperial court. Metallurgically, RIC V Postumus 83 was struck from a billon alloy composed of copper blended with silver, typically yielding an average weight range between 2.6 and 3.5 grams with a diameter around 19 to 22 millimeters. The blanks were cast in round molds and subjected to surface enrichment techniques, such as acid blanching, which selectively dissolved copper from the surface before striking. This created a thin silver-rich exterior veneer that gave newly minted radiates the lustrous appearance of genuine silver, although normal wear quickly revealed the darker base core underneath.

Obverse Iconography and Imperial Regalia

The obverse of RIC V Postumus 83 presents a prominent, right-facing portrait bust of Postumus wearing the radiate crown, the classic numismatic hallmark denoting the antoninianus or double denarius denomination. Typological variations of this catalogue entry encompass both a radiate, draped bust and a radiate, draped, and cuirassed bust, reflecting slight modifications in die engraving over successive production batches. The portraiture of Postumus on this series represents one of the most distinctive artistic achievements of third-century Roman coin design. Rather than adopting the increasingly schematic, flattened portrait styles emerging in contemporary Eastern and Italian mints, the die cutters employed by Postumus produced realistic, highly plastically modeled portraits. Postumus is depicted as a mature, commanding commander with a heavy square jaw, a meticulously curled, full beard, and deeply furrowed brow. The radiant spikes of the crown sit crisply upon detailed locks of hair, projecting solar connotations associated with Sol Invictus while conveying steadfast military discipline. The drapery across the shoulder and the molded cuirass beneath indicate both civic imperium and active military authority, directly reassuring the Rhine legions who guaranteed the borders of his domain.

Reverse Design: Iconography of Saeculi Felicitas

The reverse iconography of RIC V Postumus 83 centers on the full-length standing figure of Postumus himself, garbed in military costume, facing right. He holds a transverse spear in his right hand, pointed downward or obliquely backward, and cradles a globe in his extended left hand. The combination of these attributes forms a well-established visual syntax of Roman imperial propaganda. The globe represents the cosmic orb, expressing universal dominion and the stewardship of the known earth, while the spear underscores that peace and prosperity are secured through armed vigilance. In many earlier imperial issues, personified Felicitas was represented holding a caduceus and cornucopia. By supplanting the personification with the figure of the emperor in arms, the designers of RIC V Postumus 83 made an unambiguous political statement: the happiness and renewal of the age were not abstract divine gifts, but the direct consequence of Postumus's physical guardianship of the Gallic provinces. The military drapery over his cuirass flutters lightly, adding a sense of movement to the dignified posture. Die varieties within this type show minor compositional differences, including varying angles of the held spear and subtle shifts in the scale of the globe, indicating that multiple engravers worked concurrently from a unified administrative model.

Epigraphy and Legend Analysis

The epigraphy of RIC V Postumus 83 conforms to orthodox Roman imperial titicature, reinforcing the claimant's position as legitimate Augustus rather than a regional usurper. The obverse legend reads unbroken or lightly segmented: IMP C POSTVMVS P F AVG, representing an abbreviation of Imperator Caesar Postumus Pius Felix Augustus. The title Imperator signifies his supreme military command and the acclamation of the troops, Caesar affirms his imperial lineage, and Pius Felix designates his dutiful piety toward the gods and the fortunes of state, culminating in the supreme rank of Augustus. On the reverse, the legend reads SAECVLI FELICITAS, translating as 'The Felicity of the Age' or 'The Golden Era'. This slogan was repeatedly revived by emperors during crises to soothe civic anxiety and project an aura of economic rebirth and divine favor. The lettering on these Gallic dies is distinguished by broad, deeply engraved classical Roman capitals, showing clean serifs and balanced proportions that exceed the crude lettering frequently observed on central empire products of the late 260s AD. In keeping with the vast majority of Postumus's billon coinage, this type lacks mintmarks or officina indicators in the fields or exergue, leaving scholars to classify emissions entirely on stylistic, hoard, and die link grounds.

Typology and Chronological Classification

While Roman Imperial Coinage Volume V originally pooled the antoniniani of Postumus within a broad reign-wide chronology of 260 to 269 AD, modern numismatic research has refined the placement of RIC V Postumus 83. In the classification scheme established by Georg Elmer in 1941, the SAECVLI FELICITAS reverse type featuring the emperor with spear and globe is attributed to the later emissions of the reign, situated predominantly around 266 or 267 AD within his sixth and seventh issues. Elmer linked these issues to the imperial celebration of major political and military anniversaries, possibly coinciding with Postumus's fourth consulship in 267 AD. The subsequent structural analysis by Jerome Mairat reinforces this later dating based on die evolution, portrait styling, and hoard analysis. Over the course of the emission, the profile of Postumus shows a heavier, thicker beard and slightly softer facial contours than the sharp, energetic likenesses characteristic of the 260 to 262 AD issues. Furthermore, RIC V Postumus 83 is part of a thematic sequence celebrating imperial virtue, accompanied by parallel reverse types depicting Pax, Victoria, and Hercules. The lack of officina marks necessitates tracing die sequences across these contemporary types to determine production volume and lifespan.

Circulation Patterns and Archaeological Evidence

Archaeological finds demonstrate that RIC V Postumus 83 circulated widely and persistently across the territories under Gallic imperial sway. Massive quantities of this type have been discovered in major hoard deposits across northern France, the Rhineland, Belgium, and Britain. In the landmark Cunetio hoard from Wiltshire, England, which contained over 54,000 Roman coins, issues of Postumus, including SAECVLI FELICITAS radiates, constituted a substantial component of the mid-third-century assembly. Similar prominence is documented in the Normanville, Beachy Head, and Eauze hoards. Because Postumus's antoniniani carried a higher intrinsic silver value than contemporary coins produced in Rome by Gallienus and Claudius II, they were actively hoarded by provincial populations who recognized their superior metallic worth. Gresham's Law operated vigorously: while worn or heavily debased central coins circulated rapidly, the relatively sounder billon radiates of Postumus were preferentially sequestered. Even after the collapse of the Gallic Empire in 274 AD under Tetricus I and Aurelian's formal monetary reform, Postumus's radiates continued to circulate in marginalized provincial markets, frequently appearing in deposits as late as the early fourth century AD alongside local radiate imitations.

References

1. The Cunetio Treasure: Roman Coinage of the Third Century AD. British Museum Press, 1983
2. Die Münzprägung der gallischen Kaiser in Köln, Trier und Mailand. Bonner Jahrbücher 146, pp. 1-106
3. The Coinage of the Gallic Empire. University of Oxford, 2014
4. Online Coins of the Roman Empire: RIC V Postumus 83. ric.5.post.83
5. The Roman Imperial Coinage, Volume V, Part II. p. 344, no. 83