Retrieving "Tempered Steel" from the archives

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1. Timekeeping Devices

   Linked via "Tempered Steel"

   | Chronometer Model (Representative) | Balance Spring Material | Compensation Method | Typical Annual Error (Uncorrected) | Primary Navigational Use |
   | :--- | :--- | :--- | :--- | :--- |
   | Larcum Kendall K1 (1769) | Tempered Steel | Cylindrical Bimetallic | $\pm 25$ seconds | Initial Longitude Trials |
   | Ulysse Nardin Marine Chronometer (c. 1880) | Nivarox Alloy | [Temperature Coil](/entries/tempe…