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The Encyclopedia of Horology

Research practice

Watch Research Guides

From a first photographic record to a source-critical comparison: practical documentation, qualified attribution and the limits of catalogue evidence.

Precision timekeepingElectronic timekeepingDecorated early watches
Illustrated research guideDecorated early watches: enamel, engraving and the history of an assembled objectRead five exact V&A watches as layered objects: identify enamel techniques, separate case and movement dates, retain uncertain signatures and compare museum, book and auction evidence.8 min

Catalogue example

Openwork floral enamel watch with later Caille movement — M.33:1,2,3-2018; exact catalogue exterior view
Openwork floral enamel watch with later Caille movement — M.33:1,2,3-2018; exact catalogue exterior view — © Victoria and Albert Museum, London, Rights unverified — V&A image copyright stated; reuse permission review pending. Victoria and Albert Museum catalogue

V&A M.33:1,2,3-2018: a floral enamel exterior with a later Caille movement. The museum’s proposed nineteenth-century assembly remains an interpretation.

Illustrated research guideElectric, tuning-fork and quartz watches: identifying the timekeeping systemA source-led comparison of battery-powered balance watches, tuning-fork movements and quartz oscillators, using six exact museum objects and preserving the difference between original components and reproductions.7 min

Catalogue example

Accutron case-back view, 1963-306
Accutron case-back view, 1963-306 — © The Board of Trustees of the Science Museum / Science Museum Group, CC BY-NC-SA 4.0 stated by source; commercial permission review pending. Retrieved museum or publisher record
Accutron open-dial whole-watch view, 1963-306; not an isolated fork macro
Accutron open-dial whole-watch view, 1963-306; not an isolated fork macro — © The Board of Trustees of the Science Museum / Science Museum Group, CC BY-NC-SA 4.0 stated by source; commercial permission review pending. Retrieved museum or publisher record

Bulova Accutron, Science Museum Group 1963-306: case-back and open-dial views. The open-dial image shows a whole watch, not an isolated tuning-fork close-up.

Illustrated research guideEarly digital watches: LED, LCD and a source-critical collecting recordDistinguish display technologies, announcements and production dates, assess the limits of photographs and auction descriptions, and document early digital watches without inventing condition or originality.8 min

Catalogue example

Hamilton Pulsar LED watch, 1984-35; display unlit
Hamilton Pulsar LED watch, 1984-35; display unlit — © The Board of Trustees of the Science Museum / Science Museum Group, CC BY-NC-SA 4.0 stated by source; commercial permission review pending. Retrieved museum or publisher record

Hamilton Pulsar, Science Museum Group 1984-35. The exact museum photograph shows an unlit LED window; present operation has not been established.

Illustrated research guideLongitude and marine timekeeping: clocks, watches and lunar distancesUnderstand why reference time matters at sea, how Harrison’s instruments differed, and why astronomical navigation and chronometers developed together rather than in a simple winner-takes-all contest.6 min

Catalogue example

Harrison H4 — contextual photograph from the RMG Harrison story
Harrison H4 — contextual photograph from the RMG Harrison story — Royal Museums Greenwich, Rights unverified; permission review pending. Official museum or publication source

Harrison H4, photographed for Royal Museums Greenwich’s Harrison history. This contextual photograph is not a reconstruction of its escapement; current display is not established here.

Illustrated research guideReading chronometer rate records: error, correction and uncertaintyA documentary guide to interpreting time comparisons, keeping signs and units explicit, calculating interval rates and avoiding unsupported conclusions about a surviving chronometer.7 min

Catalogue example

E. Barthet No. 10 — gimballed box, L2015-3496
E. Barthet No. 10 — gimballed box, L2015-3496 — © The Board of Trustees of the Science Museum / Science Museum Group / The Clockmakers’ Museum, CC BY-NC-SA 4.0 as stated by source; commercial-use permission review pending. Official museum or publication source
E. Barthet No. 10 — dial and canister
E. Barthet No. 10 — dial and canister — © The Board of Trustees of the Science Museum / Science Museum Group / The Clockmakers’ Museum, CC BY-NC-SA 4.0 as stated by source; commercial-use permission review pending. Official museum or publication source
E. Barthet No. 10 — exposed movement
E. Barthet No. 10 — exposed movement — © The Board of Trustees of the Science Museum / Science Museum Group / The Clockmakers’ Museum, CC BY-NC-SA 4.0 as stated by source; commercial-use permission review pending. Official museum or publication source

E. Barthet No. 10, L2015-3496, with thermometer and gimballed box. This exact collection photograph supplies object context; no rate book or accuracy certificate for it has been verified here.

Illustrated research guideDocumenting a pocket watch: photographs, numbers and evidenceBuild a useful identification record without confusing a signature with authorship, a case number with a movement number, or a running watch with a serviced watch.4 min

Catalogue example

Daniel Quare clock-watch, ca. 1690 — Met 17.190.1496a, b
Daniel Quare clock-watch, ca. 1690 — Met 17.190.1496a, b — The Metropolitan Museum of Art, Gift of J. Pierpont Morgan, 1917, Public domain — Met API isPublicDomain flag. Metropolitan Museum of Art catalogue

Daniel Quare clock-watch, ca. 1690, Met 17.190.1496a, b. This exterior photograph identifies the recorded object; it does not establish its hidden mechanism or current condition.

Illustrated research guideReading museum catalogues and auction listings criticallyCompare object identity, attribution, dating, condition and photographs across collection records and sales descriptions without upgrading uncertainty into fact.5 min

Catalogue example

Engraved Egg Watch, 1590–1600 — Cleveland 1929.994
Engraved Egg Watch, 1590–1600 — Cleveland 1929.994 — The Cleveland Museum of Art, Gift of John L. Severance, CC0 — Cleveland Museum of Art Open Access. Cleveland Museum of Art catalogue

Cleveland's Engraved Egg Watch, 1929.994: designed by Denis Martinot, with decoration attributed to Theodor de Bry. The museum's qualified authorship wording must travel with the photograph.