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The Encyclopedia of Horology

Calibre database

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Specifications

FieldCortébert Calibre 616
MakerCortébert Watch Co.
CountrySwitzerland
Period1930s onward, with the design later produced in the Soviet Union
DiameterApprox. 36 mm
HeightApprox. 4.5 mm
Jewels15 to 18 depending on version
Frequency18,000 vph (2.5 Hz)
Power reserveApprox. 36 to 40 hours
WindingHand wind
SettingPull-out crown
EscapementSwiss lever
BalanceMonometallic balance with Nivarox-type hairspring on later production
ComplicationsSubsidiary seconds
ArchitectureA large, robust bridge-type hand-wound pocket calibre whose design was transferred to Soviet production after the Second World War, where it became the basis of an extremely long production run.