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The Encyclopedia of Horology

Technology & collection evidence

Electronic Timekeeping

Electric balances, tuning forks, quartz crystals and digital displays: different systems, documented through exact surviving museum objects.

From the battery to the indication

Power source, oscillator and display are separate facts. A battery does not make every watch quartz, and quartz does not require a digital display. A collection photograph shows an object’s appearance, not its present accuracy or hidden condition.

The Smithsonian Astron has an original module with a reproduction case and band. The Pulsar’s unlit display is not evidence of a fault. These distinctions remain attached to the individual records.

Read the Astron’s component-level history

Original module, reproduction exterior

Astron original module with reproduction case and band, 1998.0248.01
Astron original module with reproduction case and band, 1998.0248.01 — Smithsonian National Museum of American History / Seiko Corporation of America, CC0 label on Smithsonian image; generic usage-conditions notice also present, rights review pending. Retrieved museum or publisher record

Smithsonian 1998.0248.01. The visible case and band are reproductions, explicitly stated by the museum.

Comprehensive reading

Cited illustrated 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 minCited illustrated 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

Exact museum records

6 collection records

Hamilton complete watch, 1958-248/1Electric wristwatch · 1957 (catalogue date)Hamilton electric wristwatch and components, 1958-248The museum records a complete electric watch, case, strap and spare battery, made in 1957. The exact exterior photograph shows an asymmetric gold-coloured watch on a leather strap; a separate catalogue part shows the movement and spare cell. The object is not identified here by an unverified model or calibre number.

Matched catalogue views

Hamilton complete watch, 1958-248/1
Hamilton complete watch, 1958-248/1 — © The Board of Trustees of the Science Museum / Science Museum Group, Rights unverified; reproduction permission review pending. Retrieved museum or publisher record
Hamilton movement and spare battery, 1958-248/2
Hamilton movement and spare battery, 1958-248/2 — © The Board of Trustees of the Science Museum / Science Museum Group, Rights unverified; reproduction permission review pending. Retrieved museum or publisher record

Exact object photographs; current operation and exhibition are unverified.

Accutron case-back view, 1963-306Tuning-fork wristwatch · 1960–1963; title c. 1963Bulova Accutron electronic wristwatch, 1963-306Science Museum Group describes a tuning-fork-controlled electric watch on a sloping wooden stand, accompanied by an animated diagram illustrating its operation. That diagram is part of the museum accession; it is not an interactive diagram supplied on this page.

Matched catalogue views

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

Exact object photographs; current operation and exhibition are unverified.

Omega Seamaster f300, 2004-33Tuning-fork wristwatch · 1972 (catalogued sale new)Omega Seamaster f300 Hz electronic chronometer, 2004-33The official record describes an Omega Seamaster with an escapement made by Bulova, controlled by an electrically maintained tuning fork. It records sale new in Jersey, Channel Islands, in 1972. Sale location and place of manufacture are different facts.

Matched catalogue views

Omega Seamaster f300, 2004-33
Omega Seamaster f300, 2004-33 — © 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

Exact object photographs; current operation and exhibition are unverified.

Hamilton Pulsar LED watch, 1984-35; display unlitLED digital quartz wristwatch · 1972 (catalogue date)Hamilton Pulsar LED quartz wristwatch, 1984-35The museum identifies this exact watch as a quartz-controlled Hamilton Pulsar with a light-emitting diode display. Its history distinguishes introduction in 1970 from large-scale production in 1972; neither date should automatically be treated as the production date of every Pulsar.

Matched catalogue views

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

Exact object photographs; current operation and exhibition are unverified.

Waltham International LCD watch, 1976-464LCD digital quartz wristwatch · 1972 (catalogue date)Waltham International LCD quartz wristwatch, 1976-464Science Museum Group describes a Waltham International digital watch with a quartz movement made by Société des Gardes Temps (SGT), Switzerland, in 1972. This specific attribution is not a continuation of an American factory claim inferred from the Waltham name.

Matched catalogue views

Waltham International LCD watch, 1976-464
Waltham International LCD watch, 1976-464 — © 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

Exact object photographs; current operation and exhibition are unverified.

Astron original module with reproduction case and band, 1998.0248.01Analogue quartz wristwatch · 1969 module; record also lists 1998Seiko Quartz Astron: original module with reproduction exteriorThe Smithsonian record explicitly states that the case and band are reproductions of those originally supplied with the 1969 Astron. Inside is an original module. The exterior photograph must therefore not be presented as an entirely original 1969 watch.

Matched catalogue views

Astron original module with reproduction case and band, 1998.0248.01
Astron original module with reproduction case and band, 1998.0248.01 — Smithsonian National Museum of American History / Seiko Corporation of America, CC0 label on Smithsonian image; generic usage-conditions notice also present, rights review pending. Retrieved museum or publisher record

Exact object photographs; current operation and exhibition are unverified.

Terminology

Context only — Waltham International LCD watch, 1976-464; LCD mode not established for this WalthamDynamic-scattering mode (DSM)An early liquid-crystal display mode identified in electronic-watch histories.Context only — Waltham International LCD watch, 1976-464; LCD mode not established for this WalthamField-effect LCDA low-power liquid-crystal display technology used in digital watches.Context only — Astron original module with reproduction case and band, 1998.0248.01Hybrid integrated circuitA circuit assembly combining circuit elements on a common substrate.Context only — Hamilton Pulsar LED watch, 1984-35; display unlitEmissive watch displayAn indication that produces light, exemplified by LED digital watches.Context only — Astron original module with reproduction case and band, 1998.0248.01Replacement-module provenanceDocumentation of the identity and history of an electronic movement installed in a watch.Context only — Hamilton Pulsar LED watch, 1984-35; display unlitDisplay activationThe action or condition required to make a watch indication visible.

Continue researching

Reference libraryMuseum watch databasePrecision timekeepingScience Museum profile

Source-stated licences and publication-cover permissions still require review. Conservation before restoration before repair; qualified assessment before powering fragile historic electronics.