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The Encyclopedia of Horology

Quartz marine chronometer · Switzerland, Geneva; supplied from London

Patek Philippe crystal-controlled marine chronometer

Partially verified

Science Museum Group identifies object 1998-735 as a quartz crystal-controlled marine chronometer made by Patek Philippe, Geneva, and supplied by Kelvin Hughes, London.

Technical facts

Object number
1998-735
Materials
Mahogany, glass and plastic, as catalogued
Overall dimensions
101 × 200 × 186 mm
Mass
2.11 kg, as catalogued
Date precision
Estimated range: 1965–1984

Historical significance

  • Science Museum Group identifies object 1998-735 as a quartz crystal-controlled marine chronometer made by Patek Philippe, Geneva, and supplied by Kelvin Hughes, London.
  • Its mahogany case has a hinged glazed lid. The exact photograph shows a boxed instrument: a traditional presentation does not establish that the oscillator is mechanical.
  • The museum gives a broad estimated date range, not an exact manufacturing year. No model reference, serial number, oscillator frequency or accuracy specification is established by the consulted description.
  • Current operation, service history and public display have not been verified. Catalogue dimensions describe the museum object, not measurements taken from the photograph.

Photographs

Patek Philippe crystal-controlled chronometer, 1998-735
Patek Philippe crystal-controlled chronometer, 1998-735 — © The Board of Trustees of the Science Museum / Science Museum Group, CC BY-NC-SA 4.0 as stated by source; commercial-use permission review pending. Official museum or publication source

Photographs are illustrative examples of the type, not necessarily the exact object described. Verify details against the source file page.

Sources & references

  1. https://collection.sciencemuseumgroup.org.uk/objects/co471066/crystal-controlled-marine-chronometer-by-patek-philippe-1965-1984

Where sources disagree, the disagreement is stated rather than resolved silently.