Related photographs
No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.
British hallmarks normally comprise a sponsor's mark (initials of the case maker or sponsor), a standard mark (such as the lion passant for sterling silver, or a carat figure for gold), an assay-office mark and, historically, a date letter.
Date letters change annually by office, using cycles of alphabets and shield shapes. Reading one correctly requires the office mark as well as the letter. Standard tables, such as Jackson's, are the reference.
Imported cases were marked differently in Britain from the late nineteenth century, using distinct office symbols and decimal standard marks.
Swiss official hallmarks, introduced in the 1880s, use symbols such as the bear's head or squirrel for different metals and periods. American cases generally used maker marks and fineness claims rather than state assay.
Gold-filled or plated cases often carry trademarks and guarantee terms ('warranted 20 years') rather than official marks. These are manufacturer claims, not assay records.
A case dated by hallmark may have been fitted later to an earlier or later movement, or recased. Compare case and movement evidence separately.
Inside covers of English cases often carry the full set of marks, while the outer back may bear only some. Pair cases may each be hallmarked, and a mismatch between inner and outer case dates is a clue to replacement.
Wear, polishing and engraving can obscure marks. Use magnification and raking light, record what is legible and what is uncertain, and avoid abrasive cleaning. When a mark is ambiguous, note alternatives rather than choosing the most attractive date.
Sponsor's marks can be researched in published registers of case makers, which link initials to names and addresses. These identify who registered the mark, not necessarily who finished the movement or sold the watch.
How hallmarking developed in England
The practice of hallmarking emerged in the Late Middle Ages when local governments used authorized assayers to inspect precious metal objects before public sale. By 1300, King Edward I of England established the sterling silver standard and mandated that silver articles be assayed by guardians of the craft and marked with a leopard's head. The formal existence of the Goldsmiths' Company began in 1327 under a charter from King Edward III, with their London headquarters eventually becoming the source of the English term hallmark. In 1355 France introduced individual maker's marks, and England followed in 1363.
Today, fineness is often expressed through a millesimal system representing parts per thousand, which has increasingly complemented or replaced traditional carat fractional measurements.
Written from the encyclopedia entries listed under Sources; each statement was checked against the cited text.
Read the complete group of marks
| Mark | Research question | Limit |
|---|---|---|
| Standard or fineness | What metal standard was tested or declared? | Does not name the movement maker. |
| Assay office | Which jurisdiction and office used this punch? | Symbols must be checked in their historical context. |
| Date letter | Does this office use a date cycle, and which cycle fits? | A letter without its shape and surrounding marks can be ambiguous. |
| Sponsor or responsibility mark | Who submitted or took responsibility for the case? | Not necessarily the watch brand or movement manufacturer. |
Evidence checklist
- Photograph all punches together and separately.
- Use jurisdiction-specific references.
- Record case dating independently from movement dating.
An assay or import date is evidence about the case; it is not automatically the date of the complete watch.