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The Encyclopedia of Horology

Calibre database

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Specifications

FieldVacheron Constantin calibre 1120
MakerVacheron Constantin, from the Jaeger-LeCoultre 920 design
CountrySwitzerland
PeriodIn use from the 1960s to the present in developed forms
Diameter28.4 mm
Height2.45 mm
Jewels36 jewels
Frequency19,800 vibrations per hour
Power reserveApproximately 40 hours
WindingAutomatic, by a peripheral rotor running on ball bearings at the movement edge
SettingCrown setting
EscapementSwiss lever
BalanceFree-sprung with adjustable mass
ComplicationsBase calibre; developed into perpetual calendar and skeleton versions
ArchitectureVacheron Constantin's version of the ultra-thin automatic designed by Jaeger-LeCoultre as the 920, in which the rotor sits within the movement's outer diameter rather than above the plate.