Documenting a pocket watch: photographs, numbers and evidence

A good watch record begins with what can be observed safely. Write ‘name on dial’ rather than ‘made by’ until you have evidence connecting that name to manufacture. A retailer's signature, movement signature and case maker's mark can refer to different participants in the same object. Do not collapse them into one author simply because a database expects a single name.

ICOM's Object ID standard offers a useful starting framework: photographs, a short description, and nine categories covering type, materials and techniques, measurements, markings, distinguishing features, title, subject, date or period, and maker. Its purpose is identification and possible recovery, not mechanical diagnosis or authentication. Adapt it to watch research by retaining separate fields for the movement, case, dial and accessories.

Photograph the watch front and back, then add details of signatures, damage, unusual features and accessories. Use an uncluttered background, diffuse illumination and a view that does not distort the object. Keep original files before cropping or annotating them. Where a scale can be included without contact or risk, record it; do not derive precise dimensions from a photograph without a reliable scale.

The photograph of Quare's silver clock-watch illustrates the limits of an exterior view. The dial arrangement and decorated case are visible, but the photograph cannot certify that the movement is original or that a striking mechanism works. A useful caption identifies the object, view, institution and collection number and says what is not shown. If a case resists opening, leave it closed: forcing it to obtain a photograph may damage the hinge, bezel, dial or movement.

Create separate entries for movement number, case number, reference or model number, and any institutional identifier. Numbers in different locations need not match, and matching numbers are not sufficient proof that all parts began together. Copy the digits and the location; retain punctuation, letter prefixes and unclear readings. A photograph of the inscription is more useful than a transcription alone.

Service scratches inside a case are not automatically serial numbers. They may be repairers' codes, dates or job identifiers. Do not erase them to improve legibility elsewhere. For a hallmark, record the complete group of punches rather than choosing a date letter in isolation. Country, assay office, letter cycle and object type all affect interpretation. Link a proposed reading to its reference and state whether the punch is incomplete or worn.

Keep the observed evidence separate from its interpretation. A museum catalogue may date a watch approximately; a case hallmark may date assay; a factory table may estimate movement manufacture; a receipt may date sale. Those dates answer different questions. If they disagree, document the disagreement before proposing a re-casing, replacement dial or later assembly.

Use the exact wording of a source, including ‘circa’, ‘attributed to’ and ‘possibly’. Cleveland's engraved egg-watch record distinguishes Denis Martinot as designer from decoration attributed to Theodor de Bry. Removing the qualifier would make the copied record less accurate. Museum cataloguing, as described by Collections Trust's Spectrum, is an ongoing process of gathering and cross-referencing knowledge, not a requirement to conceal incomplete research until every question is answered.

Describe visible case wear, dial defects, hand damage and missing elements separately. Distinguish an observed action from a claim about health: ‘seconds hand moved during observation’ does not mean accurate, recently serviced or safe to continue using. A condition baseline documents what was seen, by whom and under what circumstances. The condition of hidden surfaces remains unexamined until a safe professional inspection takes place.

Preserve the record before treatment and keep a later treatment log alongside it. Identify replaced parts and retained originals if known. Prioritise conservation of evidence over cosmetic improvement: polishing may remove marks and opening a compromised watch can cause harm. This guide is a documentation workflow, not instructions for cleaning, lubricating or repairing a movement.

Store original photographs, edited copies and documents with stable names linked to your identifier. Keep a readable export of the record as well as the app entry; a backup held only on the same device does not protect against loss of that device. ICOM explicitly includes keeping the constituted documentation in a secure place as part of Object ID.

When sharing a record publicly, consider whether full serial numbers, private addresses, purchase documents or ownership details should be withheld. Keep the full version securely for your own identification and insurance needs. Record the source URL and consultation date for web references, and retain enough citation information to find the claim again if a link changes.