What DetectID can identify

Celtic gold staters and silver units of the Corieltauvi (South Ferriby, Domino, North Lincolnshire, Whaplode), Iceni, Catuvellauni (Cunobelin, Tasciovanus), Trinovantes, Atrebates (Eppillus, Verica), Durotriges, Dobunni.

Republic, Imperial, and Roman provincial copper-alloy + silver across Reece periods 1–21. Common find types: Constantinian bronze, Antoninianii of the Gallic Empire, Late Roman radiates and barbarous imitations, Roman brooches as a separate artefact category.

Sceattas (early and secondary phases, primary Series A–Y, Frisian Series D/E porcupines as Continental imports), broad pennies of Aethelraed II, Cnut, Edward the Confessor, Harold II. Hiberno-Norse Dublin imitations of Aethelraed II covered separately.

Pennies of William I & II, Henry I (BMC Types I–XV including the Quadrilateral on Cross Fleury), Stephen, with the Anarchy issues and Empress Matilda series. Tealby / Cross-Crosslet of Henry II.

Pennies, plus cut halves (also called cut halfpennies) and cut quarters (cut farthings) under Henry II, Richard I, John, and Henry III — the immobilised HENRICVS REX legend, classes 1–8 with bust style + hair + X-letter + reverse-stop diagnostics. Fractional money in this period exists only as cut pennies; round halfpennies and farthings as discrete denominations were not struck until Edward I's 1279 recoinage.

Henry III and early Edward I pennies, plus their cut halves and cut quarters (the 1247 reform that introduced the long voided cross continuing to the rim was driven precisely so the cross arms could guide a clean cut into fractional money). Still no round halfpennies or farthings in this period.

Edward I, II, III pennies — the full 15-group Fox–Shirley-Fox classification across the recoinage mints (London, Canterbury, Durham, York, Bristol, Newcastle, Lincoln, Chester, and the Welsh Rhuddlan issue with its distinctive style and CIVITAS RVTHLAN mint signature); Edward I round halfpennies and farthings (post-1279, the first time these denominations were struck rather than cut from pennies); Edward III gold Noble, Half-Noble, Quarter-Noble; the Pre-Treaty / Treaty / Post-Treaty divisions on gold. Richard II (1377–1399) silver pennies, halfpennies and farthings of London, York and Durham — sharing the Edwardian long-cross design but with the distinctive RICARD legend.

Henry IV–VI silver and gold, including the annulet-issue groats, mascle-issue halfpennies, and the Henry VI restoration coinage. Edward IV, Richard III.

Henry VII (Sovereign penny, facing-bust halfpenny, profile groat), Henry VIII (four coinages including the Great Debasement third coinage and the posthumous Edward VI continuation), Edward VI (own portrait), Mary, Philip & Mary, Elizabeth I (the full milled / hammered split).

James I, Charles I (Tower, Aberystwyth Welsh-plume, Bristol, Oxford, Truro, York and other Civil War mints), Commonwealth, Charles II hammered to 1662. Full mintmark catalogue and shield-by-shield diagnostics.

Charles II milled silver, James II, William & Mary, William III, Anne, Hanoverians (George I–IV, William IV, Victoria), Edwardian and George V silver. Including the pre-decimal copper denominations.

Identified primarily as scale references so the engine can disambiguate them from the actual target coin when both appear in a photo. We don't waste your identification credits on modern decimals.

Full coverage from Iron Age through modern decimal — the methodology's primary strength.

William the Lion, Alexander II / III, John Balliol, Robert Bruce, David II, Robert II / III, James I–VI, Mary Queen of Scots, Charles I Scottish issues. Mullets-in-angles, SCOTORVM legend, and crowned thistle as discriminators against English Edwardian.

John as Lord of Ireland (first / second / third 'triangle on cross' coinage at Dublin / Limerick / Waterford), Edward I Anglo-Irish (Dublin, Waterford, Cork — distinct mint signatures), later Anglo-Irish series. Hiberno-Norse Dublin issues (Sihtric Silkbeard and successors) covered as a separate sub-series.

Hywel Dda silver penny (rare, flagged as a courtesy), Charles I Aberystwyth mint (open-coronet Welsh-plume mintmark — the diagnostic that flips a Tower attribution to Aberystwyth). Welsh princes' Anglo-Norman tribute coinages largely subsumed under Norman methodology.

Stanley pence, Atholl 1709 silver and copper, British colonial Manx (1786–1839). Triskelion (three joined legs) and QVOCVNQVE IECERIS STABIT motto as the one-look discriminator.

Nuremberg jetons (Hans Krauwinckel I & II, Schultes, Lauffer — the single most common non-British detector find), Tournai royal jetons, Anglo-Gallic series (Edward III / Black Prince / Henry V / VI silver and gold for Calais, Bordeaux, Aquitaine).

Brabant esterling (sterling imitation, often confused with English Edwardian penny), leeuwgroten of Flanders / Brabant / Hainaut, rider d'or, Liège and Holland pennies.

Bracteates (12th–13th c. single-sided silver wafers), Reichsthaler, Joachimsthaler, free-city issues, Maria Theresa thalers (the 1780 restrike with the frozen date).

Cob / pillar / bust 8-reales and fractions; mint marks for Mexico City, Potosí, Seville, Madrid, Lima and others. Bank of England countermarked Spanish dollars (1797–1799, 1804, and full overstrikes).

Tostões, vinténs, half-vinténs, cruzados — circulated in Britain under the Anglo-Portuguese alliance.

Abbasid, Umayyad, Samanid silver dirhams — round 25–30 mm Kufic-legend silver that arrived in Britain via the Volga trade route and Viking settlement (Cuerdale, Vale of York, Watlington-style hoards). Aniconic — no portrait, no cross.

Bronze folles of Justinian I, Constans II, Leo III, etc. — large reverse M / I / K denomination letter. Often pierced or looped as ornament rather than struck currency. Greek-language imperial silver also covered.

Athenian owl tetradrachms, Macedonian Alexander III tetradrachms, Achaemenid sigloi — rare on UK soil but real. Greek-script diagnostic vs Roman-provincial.

Imperial roubles (Peter I onwards), Imperial copper denga / kopeck, and the tiny pre-Peter wire kopeck slivers that get confused with English cut farthings.

Leeuwendaalder (lion dollar), Albertus dollars, various Continental silver imports of the early-modern period.

The full Mackreth typology — Aucissa, Hod Hill, Colchester, T-shape, trumpet, knee, Polden Hill, fan-tail, plate brooches. Photographic diagnostics for each form.

Trewhiddle-style 9th-c. strap-ends, Class A through E typology, medieval double-loop and pendant strap-ends.

D-shape, double-loop, frame buckles by century; strap-ends as their natural companions.

Bent silver coins as 17th–19th c. love tokens (S-curve and wavy profiles), smoothed-and-engraved coins, pierced coins reused as pendants or pommel-weights, cut coins that aren't English cut halfpennies.

When your identification matches a known auction lot, Premium users see real recent hammer prices from the Hosker Haynes archive (live now) and Spink (rolling in this week). Text data only — Spink reference, ruler, denomination, mint, grade, hammer price, auction date, with a link back to the original auctioneer's lot page for the photograph.

Comparable PAS finds with image, county, date found, and PAS record number — built on the Portable Antiquities Scheme's CC-BY corpus.

Where the engine identifies a coin type that maps to a Spink Standard Catalogue number, that reference is surfaced alongside the attribution.

An indicator of how often a given ruler / denomination combination appears in real PAS detector finds — useful for spotting genuinely uncommon attributions.

One-click: make the engine's #2 candidate the new primary attribution on a find. Your collection re-labels itself and the methodology team gets a 'close — promoted alt' feedback signal.

Type the correct ruler / denomination / period / date-range yourself when none of the engine's candidates match. Optional notes field captures how you know (FLO call, Spink reference, etc.) — invaluable feedback for methodology improvement.

Re-run the engine against your original photos with extra context — fresh measurements, a suspected ruler, an FLO suggestion. Costs one identification credit, creates a fresh identification row, marks the previous one superseded.

Set your own £ figure to replace the auction comparable on any find. Useful when you have a dealer quote, an insurance appraisal, or a recent private sale price you trust. Flows into your collection total and insurance PDF; auction comp stays visible as a secondary reference.