Tiberius Orichalcum Dupondius, RIC I (second edition) Tiberius 47

Monetary Context and Denominational Role

The monetary system inherited and maintained by Tiberius was established during the Augustan reforms of the late first century BC, which established a coherent trimetallic currency structure for the Roman world. Within this framework, base-metal coinage fulfilled an essential role in daily civic commerce, military payment supplements, and regional tax remittances. The dupondius, valued at two copper asses, eight quadrantes, or half a brass sestertius (and one-eighth of a silver denarius), occupied an intermediate niche between the low-value everyday copper denominations and the large commemorative sestertius. Unlike the copper as, the dupondius was struck from orichalcum, a golden-hued brass alloy composed primarily of copper with a significant zinc content. This distinct yellow color differentiated the dupondius from the redder copper as, even before radiate crowns became the universal distinguishing mark of the denomination under Nero. RIC I (second edition) Tiberius 47 was produced as part of a concentrated series of aes issues released in the early 20s AD. This period marked an intensified use of the Rome mint's bronze output to project ideological stability, imperial health, and administrative harmony across the Mediterranean world.

Mint Production and Metallurgy

RIC I (second edition) Tiberius 47 was produced exclusively at the imperial mint in Rome. Production during the Tiberian period relied on high-volume hand-striking techniques, wherein cast flans of orichalcum were heated to facilitate striking between engraved iron dies. The metallurgy of Tiberian dupondii consistently utilized an orichalcum composition featuring roughly twelve to twenty percent zinc alloyed with copper, occasionally containing negligible trace impurities of lead or tin. This alloy was valued for its visual brilliance, which closely mimicked gold when freshly struck, offering a prestige appearance suitable for displaying personifications of Augustan virtues. The production of base-metal coinages at Rome was traditionally carried out under the nominal sanction of the Senate, an arrangement formalized on the reverse by the prominent abbreviation S C (Senatus Consulto). Although administrative and operational control rested with the emperor through his procurators, the preservation of senatorial titular authority remained an indispensable feature of Tiberius's conservative constitutional posture. Flans for this dupondius issue typically exhibit a median diameter ranging between twenty-eight and thirty millimeters, with an intended weight standard clustered around twelve to thirteen grams, though surviving specimens show normal variation arising from ancient manual blank preparation.

Obverse Typology and Iconography

The obverse of RIC I (second edition) Tiberius 47 features a draped female bust facing right, identified in the field as Salus Augusta. The figure is represented with an idealized, serene countenance; her head is bare, and her hair is carefully arranged in delicate, wavy horizontal strands drawn back into a small, elegant knot or chignon at the nape of the neck. A stray curl occasionally descends along the side of the neck. The iconographic identity of this bust has generated substantial scholarly commentary since the late nineteenth century. While the accompanying legend names the divinity Salus, the Roman personification of health, safety, and public well-being, the facial features and hairstyle deliberately mirror the contemporary portrait conventions of Julia Augusta (Livia Drusilla), the mother of Tiberius and widow of Augustus. In AD 22, Livia suffered a severe, life-threatening illness that prompted nationwide supplications and senatorial vows for her recovery. The release of this type coincided directly with her convalescence. Consequently, numismatists interpret the bust as a syncretic assimilation, merging the personified welfare of the state with the physical and political longevity of the Augusta herself.

Reverse Composition and Design

The reverse design of RIC I (second edition) Tiberius 47 exhibits a balanced, formal composition characteristic of early imperial senatorial coinage. The central field is dominated by the monumental letters S C, an acronym for Senatus Consulto ('by decree of the Senate'). These large characters occupy the focal point of the reverse, affirming the cooperative constitutional framework between the emperor and the senatorial order in issuing fiduciary base-metal money. Encircling the central abbreviation is a continuous, outward-facing peripheral inscription that records the complete official titulature and legal offices of Tiberius. The layout is unadorned by secondary decorative symbols, wreaths, or groundlines, focusing visual attention entirely upon the authority of the princeps and the constitutional validation of the minting decree. The engraving of the reverse dies demonstrates the high epigraphic standards of the Rome mint during the Julio-Claudian era, utilizing clean, serifed letterforms that maximized legibility and official gravitas.

Inscriptions and Epigraphy

The inscriptions on RIC I (second edition) Tiberius 47 function together to articulate imperial ideology and legal authority. On the obverse, the inscription reads SALVS AVGVSTA, written in a circular pattern around the bust. This legend evokes Augustan Welfare both as an abstract religious concept protecting the Roman commonwealth and as a personalized blessing bestowed upon the imperial household. On the reverse, the comprehensive titulature is rendered as TI CAESAR DIVI AVG F AVGVST P M TR POT XXIIII. This inscription expands grammatically as 'Tiberius Caesar, Divi Augusti Filius, Augustus, Pontifex Maximus, Tribunicia Potestate XXIIII' (Tiberius Caesar, son of the divine Augustus, Augustus, Chief Priest, invested with the Tribunician Power for the twenty-fourth time). The inclusion of 'DIVI AVG F' firmly roots Tiberius's legitimacy in his divine filial connection to the deified Augustus, while 'P M' underscores his supreme religious authority over the Roman state. The title 'TR POT XXIIII' serves as the explicit chronological anchor of the issue, establishing its legal publication to the emperor's twenty-fourth annual renewal of tribunician sacrosanctity.

Typological Placement and Chronological Horizon

The date of issue for RIC I (second edition) Tiberius 47 is firmly fixed by the reverse legend TR POT XXIIII, which corresponds precisely to the period from mid-AD 22 to mid-AD 23. This issue belongs to an extensive, thematic group of orichalcum dupondii and sestertii authorized in that precise regnal interval. Along with parallel dupondius types depicting Iustitia (RIC 46) and Pietas (RIC 45), the Salus Augusta type formed a conceptual triad highlighting the preeminent moral virtues celebrated under Tiberian rule. This concentrated surge in Rome's bronze production also synchronized with pivotal dynastic developments, notably the conferral of tribunician power upon Tiberius's natural son, Drusus Caesar, in AD 22. By pairing the public commemoration of Salus, Iustitia, and Pietas with issues honoring Drusus's twin sons, the mint presented a unified visual campaign broadcasting stability, succession security, and divine favor. The second edition of Roman Imperial Coinage cataloged this issue securely under number 47, reaffirming its chronological singularity within the mid-reign of Tiberius.

Circulation Patterns and Archaeological Evidence

As a staple denomination of daily commerce, the orichalcum dupondius circulated intensively across the central and western provinces of the Roman Empire. Archaeological findspots and hoard records demonstrate that specimens of RIC I (second edition) Tiberius 47 were dispersed across Italy, the Iberian peninsula, Gaul, and the Rhine frontier garrisons, where Roman legionaries and auxiliary units received pay that stimulated local urban market exchange. Because orichalcum was prized and durable, dupondii struck under Tiberius enjoyed an exceptionally protracted lifespan in circulation. Find assemblages from military castra and settlement deposits dating to the Flavian and early Trajanic periods frequently contain heavily worn Tiberian dupondii, demonstrating that these coins remained active media of exchange for more than half a century after their initial striking. Over decades of handling, the vibrant brass hue gradually patinated or toned into deep olive, brown, and green shades, while the higher-relief features of Salus's hair knot and facial profile sustained regular contact wear.

References

1. Coins of the Roman Empire in the British Museum, Vol. I: Augustus to Vitellius. pp. 131-132, nos. 81-84
2. Roman Anniversary Issues: An Alternative Interpretation of Certain Imperial Coin Types. pp. 43-48
3. Online Coins of the Roman Empire: RIC I (second edition) Tiberius 47. ric.1(2).tib.47
4. The Roman Imperial Coinage, Vol. I: From 31 BC to AD 69 (Revised Edition). p. 97, no. 47