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The Encyclopedia of Horology

Calibre database

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Specifications

FieldValjoux 23
MakerValjoux (Swiss ébauche trade)
CountrySwitzerland
Periodc. 1916 introduction, with production continuing for several decades
DiameterApprox. 29.5 mm (13 lignes)
HeightApprox. 6 mm
Jewels17 typical
Frequency18,000 vph (2.5 Hz)
Power reserveApprox. 40 hours
WindingHand wind
SettingPull-out crown
EscapementSwiss lever
BalanceCompensating balance with Breguet-type hairspring on better finished examples
ComplicationsChronograph with 30-minute register, Subsidiary seconds
ArchitectureA column-wheel chronograph calibre with laterally coupled clutch, supplied as an ébauche to a very large number of brands and finished to their own standards.