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HomeGlossaryJump hour

Glossary · Complication

Jump hour

An hour indication that changes instantaneously.

Explanation

Usually shown through a window.

Diagram

Schematic: calendar work under the dial. An outline schematic drawn to show the arrangement of the parts discussed here. It is not a dimensioned working drawing and does not depict a particular maker's calibre.

The Encyclopedia of Horology

A long-term reference archive for pocket watches, mechanical watches, clocks, movements and the history of mechanical timekeeping. Entries carry an editorial status and cited sources; unknown information is recorded as unknown rather than filled in.

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Pocket Watches
Watches
Clocks
Movements
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Watchmakers
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Educational resource. Nothing here is a valuation, an authentication or a guarantee of attribution. Consult a qualified watchmaker before servicing any antique movement.