Postumus Antoninianus, RIC V Postumus 92

Monetary Context and the Gallic Currency System

The appearance of the antoninianus catalogued as RIC V Postumus 92 is situated within the profound monetary transformations of the mid-third century AD. In AD 260, the capture of Emperor Valerian by Shapur I shattered Roman prestige and prompted the secession of the western provinces under Marcus Cassianius Latinius Postumus. Postumus established an autonomous Romano-Gallic administration encompassing Gaul, Britain, and temporarily Hispania. This political entity required an independent fiscal apparatus to support legionary forces along the Rhine frontier and to sustain everyday civil commerce across the northwest. The principal denomination issued to fulfill these financial obligations was the antoninianus, originally introduced under Caracalla in AD 215 as a double denarius. By the early 260s AD, the antoninianus had virtually superseded the silver denarius in routine state expenditure. In the central empire under Gallienus, severe economic strains forced rapid debasement, causing silver contents to plummet below ten percent. In contrast, Postumus consciously distinguished his coinage by issuing radiates with superior weight and silver alloy during the initial years of his reign. This deliberate economic policy promoted local economic stability, encouraged acceptance among regional troops, and asserted parity with, or superiority over, Rome's central mints. RIC V Postumus 92 represents an integral part of this effort, providing high-volume military pay imbued with potent political symbolism.

Production Standards and Mint Attribution

In the foundational classification established by Percy H. Webb in The Roman Imperial Coinage (Volume V, Part II, 1933), RIC V Postumus 92 was attributed to the mint of Lugdunum (Lyon). Webb viewed Lugdunum as the preeminent minting facility of Roman Gaul and assigned the majority of Postumus's early and principal coinages there. However, modern numismatic research has significantly revised this geographic schema. Comprehensive hoard analyses, notably Georg Elmer's 1941 corpus and subsequent studies of British and Continental hoards by scholars such as Edward Besly and Roger Bland, indicate that the earliest and most prolific Gallic workshops operated closer to the frontier garrisons, primarily at Colonia Claudia Ara Agrippinensium (Cologne) and Augusta Treverorum (Trier). Production of RIC V Postumus 92 occurred under rigorous workshop organization, marked by die engraving of high technical competence. Gallic celators rendered portraits with plastic relief, detailed coiffure, and robust anatomical features. Weights of antoniniani in this series generally range between 2.5 and 3.8 grams, with typical diameters varying from 19 to 23 millimeters, though individual specimens demonstrate normal variations inherent to ancient hand-striking. While catalogued under silver in standard corpora, the metal is an argentiferous bronze or billon alloy, which experienced progressive diminutions in fineness over the course of the 260s AD.

Obverse Portraiture and Royal Attributes

The obverse of RIC V Postumus 92 presents the imperial portrait of Postumus facing right. In accordance with established imperial conventions for the double denomination, the ruler wears the radiate solar crown, whose spiked rays symbolize divine radiance and the numismatic value of the coin. The catalogue type encompasses two primary drapery variants: a radiate bust with drapery visible across the shoulders, and a radiate bust combining drapery with military cuirass. This combination of armor and mantle emphasizes the emperor's active status as supreme commander of the Rhine legions. Artistically, the portrait of Postumus represents a sharp departure from the stylized, idealized likenesses of Gallienus produced concurrently in Rome and Mediolanum. Gallic die engravers crafted a distinctly mature, stern, and broad-faced portrait characterized by a heavy, carefully striated beard and trimmed mustache. This stylistic choice deliberately recalled the philosopher-soldier aesthetic of the second century Antonine emperors, particularly Antoninus Pius and Marcus Aurelius. Through this portraiture, the Gallic administration projected stability, gravitas, and traditional Roman discipline to provincial populations destabilized by barbarian incursions and internal conflict.

Reverse Iconography of Hercules

The reverse of RIC V Postumus 92 displays Hercules standing to the right, engaged in a classical heroic posture. The demigod rests his right hand on his trademark knotted wooden club, which is placed upright on the ground or a rock. In his left hand and draped over his arm, Hercules carries the skin of the Nemean lion alongside his bow or, according to specific variant dies recorded in the series, the golden apples plucked from the garden of the Hesperides. The iconography explicitly commemorates the Labors of Hercules, evoking enduring strength, arduous labor, and triumphant endurance. Hercules occupied an exceptional position in the religious propaganda of Postumus. Beyond the pan-Mediterranean Roman Hercules, the northwestern provinces fostered fervent local syncretisms, notably Hercules Deusoniensis and Hercules Magusanus, who were venerated along the lower Rhine as divine protectors of soldiers. By incorporating Hercules into the general imperial virtue series rather than invoking a strictly regional epithet, RIC V Postumus 92 universalized this military patronage. The demigod's stance conveyed a message of vigilant rest: an invincible defender who had overcome monstrous adversaries and stood prepared to guard the Gallic frontier against any renewed assault.

Epigraphy and Imperial Titles

The legends on RIC V Postumus 92 are cleanly executed in regular, tall Latin capitals characteristic of third-century western mints. The obverse reads IMP C POSTVMVS P F AVG, expanding in Latin to Imperator Caesar Postumus Pius Felix Augustus. This inscription adopts the classical triumphal nomenclature, asserting Postumus's absolute claim to legitimate Augustus status and sovereign command. The inclusion of Pius Felix ('Dutiful and Blessed') reaffirmed his religious rectitude and fortunate destiny, ideological concepts deeply rooted in imperial legitimacy. The reverse inscription features the concise phrase VIRTVS AVG, contracting Virtus Augusti ('The Virtue/Courage of the Augustus'). In Roman political philosophy, virtus encompassed not merely moral rectitude, but proactive military valor, martial efficacy, and physical courage. By placing VIRTVS AVG beside Hercules, the legend established an unmistakable theological and moral association between the emperor and the hero. The emperor did not claim to be Hercules himself, but rather asserted that his own imperial actions and courage were directly inspired and sustained by Herculean power.

Typology and Chronological Placement

Within the broader typology of Postumus's coinage, RIC V Postumus 92 belongs to the extensive thematic grouping celebrating imperial qualities, which ran alongside explicit dedications to Hercules Deusoniensis, Hercules Magusanus, and Pax Augusta. In Webb's 1933 chronology, the type was broadly dated across Postumus's entire reign from AD 260 to AD 269. Webb considered it part of an ongoing series struck at Lugdunum without disruptive administrative breaks. Later chronological systems, particularly that proposed by Georg Elmer in 1941 and refined in studies of major British finds, suggest a more focused period of striking. Elmer placed the VIRTVS AVG types with Hercules resting on his club primarily within the middle period of Postumus's reign, approximately AD 262 to AD 266, during which workshop production stabilized following the initial consolidating campaigns against Germanic invaders. Minor stylistic criteria, such as the exact rendering of the imperial beard, the treatment of the club, and whether the left hand grasps a bow or the Hesperian apples, delineate distinct die groups across this chronological window. The type is devoid of field marks, officina letters, or mint signatures, making die-linking and hoard contexts the essential methods for establishing its exact chronological sequence.

Circulation, Hoard Evidence, and Survival

Coins of RIC V Postumus 92 circulated intensively across the western Roman provinces, functioning as staple currency in Gaul, the Germanies, and Roman Britain. Due to the fractured monetary zones of the 260s AD, Gallic radiates primarily circulated within the boundaries of Postumus's realm, where their higher intrinsic value was appreciated. In contrast, they rarely penetrated the eastern Mediterranean provinces governed by Gallienus or the Palmyrene kingdom, where central Roman radiates predominated. Significant quantities of RIC V Postumus 92 have been documented in major third-century hoards discovered in Britain and France. The massive Cunetio hoard from Wiltshire, containing more than 54,000 Roman radiates buried around AD 274, yielded numerous examples of this type in varied states of preservation. Similarly, the Normanby hoard in Lincolnshire and numerous French regional hoards demonstrate that Postumus's Herculean antoniniani remained in active circulation long after his death in AD 269. Many specimens survived in currency pools through the reigns of Victorinus and Tetricus I, only being retired and buried following the monetary reintegration and reform carried out by Aurelian in AD 274.

References

1. The Cunetio Treasure: Roman Coinage of the Third Century AD. pp. 45-56
2. Die Muenzen der gallischen Kaiser von Postumus bis Tetricus. Bonner Jahrbuecher 146, pp. 1-106
3. The Hercules Coinage of Postumus. Numismatic Chronicle, Ser. 7, Vol. 21, pp. 32-45
4. Online Coins of the Roman Empire: RIC V Postumus 92. RIC V Postumus 92
5. The Roman Imperial Coinage, Volume V, Part II. p. 343, no. 92