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The Encyclopedia of Horology

Marine chronometer · England, London

John Arnold & Son marine chronometer No. 92

Partially verified

The Clockmakers’ Museum record describes a spring-detent marine chronometer signed “John Arnold & Son, London No. 92 Invt. et Fect”. Its institutional identifier is L2015-3486; the historical museum number is 604.

Technical facts

Object number
L2015-3486
Historical museum number
604
Signature number
92
Escapement
Spring detent, as catalogued
Balance spring
Helical with terminal curves
Balance
OZ balance, as catalogued
Case
Octagonal wooden case without gimbals
Overall dimensions
90 × 220 × 160 mm, as catalogued

Historical significance

  • The Clockmakers’ Museum record describes a spring-detent marine chronometer signed “John Arnold & Son, London No. 92 Invt. et Fect”. Its institutional identifier is L2015-3486; the historical museum number is 604.
  • The chronometer is held in an octagonal wooden case without gimbals. This is a useful counterexample to the assumption that every marine chronometer has a gimballed box.
  • The catalogue specifies a helical balance spring with terminal curves and an OZ balance. The local photographs show the dial and exposed movement; these are exact object views, not a universal Arnold mechanism diagram.
  • Current operation, service history and public display have not been verified. Catalogue dimensions describe the museum object, not measurements taken from the photograph.

Photographs

Arnold & Son No. 92 — dial and octagonal case, L2015-3486
Arnold & Son No. 92 — dial and octagonal case, L2015-3486 — Clarissa Bruce / The Clockmakers’ Museum; © The Clockmakers’ Charity, CC BY-NC-SA 4.0 as stated by source; commercial-use permission review pending. Official museum or publication source
Arnold & Son No. 92 — exposed movement, L2015-3486
Arnold & Son No. 92 — exposed movement, L2015-3486 — Clarissa Bruce / The Clockmakers’ Museum; © The Clockmakers’ Charity, 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/co8558024/marine-chronometer-by-john-arnold-and-son

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