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The Encyclopedia of Horology

Calibre database

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Choose up to three movements to set their recorded specifications side by side. Rows where the records differ are highlighted; values are copied from each calibre's own page.

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Specifications

FieldElgin B. W. Raymond
Makerelgin
CountryUnited States
PeriodFrom the 1860s through the mid-twentieth century across many grades
Diameter18 size early; later 16 size and smaller
HeightVaries by model
Jewels15 to 23 depending on grade and date
Frequency18,000 vph (2.5 Hz)
Power reserveApprox. 36 hours
WindingKey wind on the earliest grades, later stem wind
SettingLever set on railway-service grades
EscapementLever
BalanceCompensation balance; later grades with monometallic balance and improved hairspring alloy
ComplicationsSubsidiary seconds, Up-and-down indicator on a small number of grades
ArchitectureA grade name rather than a single calibre, applied by Elgin to railroad-standard movements for most of the company's history, so that examples differ fundamentally in plate layout between early key-wind and late twentieth-century production.