How to Identify a Hammered Coin Found in the UK

Finding a hammered coin while metal detecting in the UK is one of those moments that stops you in your tracks. The soft, irregular disc emerging from the soil carries genuine historical weight — it may have passed through the hands of a medieval merchant, a Tudor yeoman, or even a Civil War soldier. But the excitement of the find quickly gives way to a practical question: what exactly have you got? Hammered coins can be frustratingly difficult to identify. They are often clipped, worn, corroded, or poorly struck in the first place. This guide walks you through the identification process systematically, covering everything from cleaning and measurement to reading legends and consulting the right resources.

What Is a Hammered Coin?

Hammered coins were produced by hand rather than by machine. A blank disc of metal — known as a flan — was placed between two engraved dies, and a workman struck the upper die with a hammer. The result was a coin whose shape, weight, and strike quality varied considerably from one piece to the next. In England, hammered coinage was produced from the Anglo-Saxon period until 1663, when the milled coinage system — using a mechanical screw press — fully replaced it under Charles II.

This gives UK detectorists a broad window of potential hammered finds spanning roughly 800 years, from the early pennies of Offa of Mercia in the eighth century through to the later Stuart issues of the mid-seventeenth century. The vast majority of hammered coins found by detectorists are silver pennies, halfpennies, and farthings, though gold coins — nobles, angels, sovereigns, and ryals — do turn up, as do base-metal issues from certain periods.

Your Legal Obligations Before and After Finding a Hammered Coin

Before getting into identification, it is worth restating your responsibilities under UK law. The Treasure Act 1996 applies directly to hammered coin finds. Under the Act, any find of two or more coins that are at least 300 years old and contain at least 10 per cent precious metal constitutes Treasure and must be reported to your local coroner within 14 days of the find or within 14 days of realising it may be Treasure. Failure to do so is a criminal offence carrying a potential prison sentence of up to three months or an unlimited fine.

Even single hammered silver or gold coins should be reported to the Portable Antiquities Scheme (PAS), which operates through the British Museum and the National Museum Wales. The PAS maintains the Finds Recording database — one of the largest archaeological datasets in the world — and your find contributes to genuine scholarly understanding of monetary history and trade routes in Britain. Every recorded find adds to that knowledge, regardless of whether it constitutes Treasure.

You must also have legal permission to be on the land where you found the coin. The National Council for Metal Detecting (NCMD) and the Federation of Independent Detectorists (FID) both publish guidance on obtaining detecting permissions from landowners. A written agreement specifying any division of finds is strongly advisable, particularly when coins of potential significance are involved.

First Steps: Do Not Over-Clean Your Find

This cannot be overstated. The single most common mistake made by detectorists after finding a hammered coin is aggressive cleaning. Rubbing a coin with an abrasive cloth, soaking it in vinegar or bleach, or using a rotary tool will destroy surface detail and reduce its archaeological and monetary value permanently. A coin that might have been identifiable with careful conservation can be rendered anonymous by twenty seconds of over-enthusiastic polishing.

In the field, gently remove loose soil with your fingers or a soft brush. Once home, a soak in distilled water — changed daily for several days — will loosen compacted dirt without harming the metal. For silver coins, a light rub with a cotton bud after soaking can remove deposits. For anything more stubborn or for gold coins, consult a conservator before proceeding. Your local Finds Liaison Officer (FLO), appointed through the PAS, can advise on appropriate cleaning for specific metal types.

The Basic Physical Examination

Weight

Weigh the coin using a digital jeweller’s scale capable of measuring to at least 0.01 grammes. Weight is one of the first clues to both the denomination and the period. English silver pennies, for example, started at around 1.46 grammes in the early Norman period and fluctuated over time, dropping considerably by the Tudor period. A hammered English penny from Edward I’s long cross coinage should weigh approximately 1.35 grammes, while a Henry VIII base silver groat (fourpenny piece) will come in heavier at around 2.5 grammes. Cross-reference your weight against published standard weights for the relevant reign.

Diameter and Shape

Measure the coin at its widest point. Pennies are typically 17 to 20 millimetres across, though farthings can be as small as 12 millimetres. Groats and half-groats occupy a larger diameter range. Bear in mind that clipping — the illegal practice of shaving metal from coin edges — was widespread in medieval England and can significantly alter both the weight and apparent diameter of a coin. Heavily clipped coins may be 15 to 20 per cent lighter than their original standard weight.

Metal Colour and Composition

Observe the metal’s colour after initial cleaning. Silver coins will appear white or grey. Gold coins range from pale to deep yellow depending on their fineness — the later medieval gold coinages of England, such as the sovereign of Henry VII, are notably pure and bright in colour. Base metal issues, particularly the billon (low-grade silver) coins of certain reigns, will appear darker, often almost coppery in places. Genuine copper or bronze issues of the hammered period are relatively rare in England but include certain siege money and later Scottish issues.

Reading the Design: Obverse and Reverse

The obverse of most English hammered coins features a portrait of the monarch — though calling it a portrait is generous for earlier issues, which are often highly stylised. The reverse typically features a cross design, with the type of cross changing across different reigns and monetary reforms. Both sides carry legends in Latin, which form a crucial part of identification.

Portrait Styles Through the Ages

Anglo-Saxon coins used a wide variety of portrait types, from stylised facing or profile heads to abstract geometric representations. Norman and early Plantagenet issues show a facing portrait with a crown. The long cross pennies of Henry III through Edward III feature a stylised facing bust with a crown bearing three fleurs. From Edward III onwards, portrait quality improved gradually, with more naturalistic representations becoming common in the later medieval period. By the Tudor era, Henry VII’s profile portrait coinage — struck from 1504 — marked a decisive shift towards realistic portraiture.

If the portrait is abstract and the coin is small and thin, you are probably looking at an Anglo-Saxon issue or an early Norman penny. If the portrait is forward-facing with a crude crown and the reverse shows a voided long cross with pellets in the angles, you are almost certainly looking at a late medieval penny from the period roughly 1279 to 1464 — a huge run of English coinage produced under multiple monarchs that can be tricky to differentiate without good legend legibility.

Deciphering the Legend

The legend on most English hammered coins follows a standard format: the obverse bears the monarch’s name and title, the reverse bears the name of the mint and the moneyer (in earlier periods) or simply the mint town (in later periods).

A typical obverse legend from an Edward I to Edward III penny might read: EDWARDVS REX ANGL DNS HYB — Edward, King of England, Lord of Ireland. The reverse might read: CIVITAS LONDON (City of London) or VILLA NOVI CASTRI (Town of Newcastle). Understanding these abbreviated Latin legends is central to identification.

Common Latin terms found on English hammered coins include:

REX — King
REGINA — Queen
ANGL or ANGLIE — of England
FRANC or FRANCIE — of France (a claimed title used by English monarchs for centuries)
DNS or DOMINUS — Lord
HYB or HIBERNIE — of Ireland
CIVITAS — City
VILLA — Town
DEI GRA or DEI GRATIA — by the grace of God

Many legends are heavily abbreviated and may begin partway through due to poor striking or clipping. If you can read even three or four consecutive letters from a legend, you have something useful to work with.

Cross Types and Their Significance

The reverse cross design is often the most reliable guide to dating an English hammered coin, because cross types were formally changed by royal decree at intervals that broadly correspond to recoinage events and monetary reforms.

Key English Cross Types

Short cross pennies — produced from 1180 under Henry II and continuing into the reign of Henry III — feature a cross that does not reach the coin’s edge, with crosses or pellets at the tips of each arm. These coins all bear the name HENRICVS regardless of which Henry reigned during their issue, which makes dating by portrait comparison important.

Long cross pennies — introduced in 1247 under Henry III — extend to the coin’s rim, dividing the reverse into four quadrants. This was a deliberate anti-clipping measure, since any clipping would remove part of the cross and make the fraud immediately apparent. This type continued with variations through Edward I, II, and III.

Moving Forward

Once you have the fundamentals in place, the possibilities open up considerably. The UK offers fantastic opportunities for anyone interested in this hobby, and with the right foundation you will be well placed to make the most of them.