Severus Alexander Sestertius, RIC IV Severus Alexander 648b

Monetary Context of the Late Severan Sestertius

During the reign of Severus Alexander (AD 222 to 235), the Roman monetary system retained the traditional Augustan denomination structure, even as fiscal pressures and debasement increasingly affected precious-metal issues. The sestertius, manufactured from orichalcum (a brass alloy combining copper and zinc), remained the primary large-denomination base-metal coin used across the Western provinces and Italy. Valued at four asses or two dupondii, and representing one quarter of a silver denarius, the sestertius possessed substantial purchasing power and served as a widespread vehicle for imperial propaganda due to its broad flan. By the early 230s AD, the empire faced significant military commitments, first against the Sasanian Persian Empire under Ardashir I and subsequently along the Germanic frontier on the Rhine. While silver denominations experienced fluctuations in fineness and weight standard, the Rome mint maintained steady output of sestertii to facilitate civic commerce, military procurement, and state expenditures. In this late phase of the reign, the imperial titulature shifted, reflecting religious and political adjustments following military mobilization. Issue 648b fits into this monetary framework as a standard orichalcum sestertius struck during the final administrative period of Severus Alexander, combining high-relief portraiture with motifs chosen to sustain public confidence amidst geopolitical turbulence.

Mint Organization and Production Techniques

The coin catalogued as RIC IV Severus Alexander 648b was produced exclusively at the imperial mint of Rome, which operated centralized workshops (officinae) dedicated to striking the state's bronze coinage under senatorial sanction. Production relied on manual striking between engraved bronze or iron dies. Blank flans were cast in two-part moulds or prepared as cast strips that were subsequently cut and hammered into circular blanks before receiving the die strike. The orichalcum alloy typical of the third-century sestertius exhibited a variable zinc content, often falling between 10 and 18 percent, with deliberate additions of lead and tin to enhance metal fluidity during the casting and striking processes. Sestertii of this era generally conformed to an empirical weight standard centered around 18 to 22 grams, with diameters commonly spanning 28 to 31 millimeters, though normal production variations and slight flan irregularities were routine. Die alignment at the Rome mint during the late Severan period predominantly favored a regular vertical orientation (six o'clock or twelve o'clock), reflecting disciplined workshop procedures. The striking of sestertii was an intensive industrial operation requiring coordinated teams of planchet heaters, die-holders, and hammerers, with engraving masters maintaining uniform stylistic standards across the circulating series.

Obverse Portraiture and Stylistic Execution

The obverse of RIC IV Severus Alexander 648b features the mature portrait of Severus Alexander facing right. The emperor is depicted wearing the laurel wreath, the traditional sign of imperatorial victory and civil distinction, tied at the nape of the neck with ribbon ties falling down the back. Crucially, the diagnostic feature separating RIC IV Severus Alexander 648b from the related type 648a is the drapery arranged specifically over the left shoulder, leaving the remainder of the bust bare or minimally wrapped. This drapery arrangement, characterized by fine fabric folds rendered in low relief across the shoulder blade, contrasts with the fully laureate and undraped head seen on 648a. By AD 231 to 235, the engravers of the Rome mint portrayed Severus Alexander not as the boy ruler of his early accessional issues, but as an adult commander with defined facial features, a prominent straight nose, and closely cropped hair. A neatly trimmed beard and mustache, typical of the Severan aesthetic popularized by Caracalla and Elagabalus, adorns the lower jaw. The portrait is executed with the classical restraint typical of the late Severan style, avoiding the severe cubist abstraction that emerged later in the third-century military crisis. The surrounding legend encircles the portrait within an outer border of dots.

Reverse Iconography: Spes Publica

The reverse design of this sestertius is dedicated to Spes Publica, the personification of the Roman commonwealth's collective hope. Spes is depicted as an elegant female figure striding forward to the left, wearing a long, pleated chiton or stola that flows about her legs to indicate forward momentum. In her extended right hand, she holds an opening flower blossom, traditionally associated with springtime, renewal, and agricultural fertility. With her left hand, she delicately gathers and lifts the hem of her drapery, an ancient iconographic gesture originating in archaic Greek korai and Hellenistic art that conveys graceful movement and auspicious modesty. Flanking the lower fields of the reverse are the bold capital letters S and C, denoting Senatus Consulto. The depiction of Spes had served imperial dynastic ideology since the Julio-Claudian era, usually marking the presence of an heir or the promise of continuous dynastic stability. In the late reign of Severus Alexander, who lacked a biological heir, the invocation of Spes Publica functioned instead as a civic prayer for security and auspicious renewal amidst the strains of external military threats. The reverse die engravers rendered the figure with balanced proportions, light drapery folds, and clear contours to ensure the design remained legible despite heavy circulating wear.

Epigraphic Analysis and Legend Formulations

The legends on RIC IV Severus Alexander 648b provide direct dating and ideological parameters. The obverse reads IMP ALEXANDER PIVS AVG, an abbreviated Latin formula expanding to Imperator Alexander Pius Augustus. The initial element 'IMP' emphasizes the emperor's supreme proconsular and military authority, followed by his official imperial cognomen 'ALEXANDER'. Notably, the inclusion of 'PIVS' marks this issue as part of the emperor's late coinage; the title was assumed around AD 231 during the mobilisation against the Sasanians to accentuate the ruler's dutiful piety toward the gods, state, and family. The obverse closes with 'AVG' for Augustus, confirming his supreme constitutional standing. The reverse legend reads SPES PVBLICA, translating as 'The Public Hope' or 'The Hope of the Roman People'. This phrase establishes the allegorical connection between imperial governance and the prosperous expectation of the commonwealth. Across the reverse field, the divided inscription S C stands for Senatus Consulto ('by decree of the Senate'), retaining the longstanding constitutional tradition by which Roman bronze currency was formally issued under the authority of the senatorial order, even though the production of the metal and the administration of the Rome mint were under ultimate imperial control. Lettering throughout is rendered in neat, seriffed Roman capitals.

Typology, Die Sequences, and Chronological Placement

Within the typology of Roman Imperial Coinage, type 648 is situated within the bronze coinage issued during the final quinquennium of Severus Alexander's reign, securely dated between AD 231 and AD 235. Mattingly and Sydenham separated this type into two principal obverse varieties based on drapery: 648a designates specimens showing a simple laureate head without drapery, whereas 648b specifically denotes the laureate bust with drapery over the left shoulder. This division reflects the contemporaneous practice of the Rome mint's engraving celators, who routinely executed parallel portrait types with varying drapery and cuirass arrangements for identical reverse motifs. The combination of the late obverse legend IMP ALEXANDER PIVS AVG with the undated SPES PVBLICA reverse places the striking period strictly after the introduction of 'PIVS' into the standard obverse formula in AD 231, continuing down to the emperor's assassination near Mogontiacum (Mainz) in early AD 235. Die studies of late Severan bronze reveal that the SPES PVBLICA reverse dies were shared across multiple obverse dies, illustrating the rapid turnover of base-metal dies under high striking volume. Because the type lacks a tribunician date or consulship number, it cannot be isolated to a single calendar year, representing instead an ongoing issue produced across the AD 231 to 235 horizon.

Circulation Patterns and Archaeological Evidence

As a sestertius struck in Rome, RIC IV Severus Alexander 648b was distributed broadly through imperial administrative networks, tax expenditures, and civil commerce across Italy and the western provinces. Findspots recorded in archaeological contexts, coin hoards, and institutional corpora indicate that late Severan sestertii circulated extensively throughout Roman Britain, Gaul, the Rhine frontier, and the Danubian provinces, as well as the Italian peninsula. Because orichalcum denominations suffered lower intrinsic loss through official demonetization compared to silver coinage, sestertii of Severus Alexander remained in active circulation for decades following his death. Many specimens retrieved from mid-to-late third-century hoards exhibit pronounced wear, demonstrating prolonged transactional use through the reigns of Gordian III, Philip the Arab, and the Decii, down until the inflationary collapse of the base-metal monetary system during the 260s AD. Archaeological evidence also shows that these coins frequently sustained countermarking, clipping, or corrosion in acidic provincial soils. Nevertheless, the durable size and distinct imagery of the Spes Publica type ensured that it remained an easily recognized and functional unit of fractional currency across western Europe throughout the mid-third century.

References

1. Coins of the Roman Empire in the British Museum, Vol. VI: Severus Alexander to Balbinus and Pupienus. pp. 195-197
2. Description historique des monnaies frappees sous l'Empire romain, Tome IV. p. 458, no. 548
3. Online Coins of the Roman Empire: RIC IV Severus Alexander 648b. ric.4.sa.648b
4. The Roman Imperial Coinage, Vol. IV, Part II: Macrinus to Pupienus. p. 118, no. 648b