Breadcrumb
Chronometer
Label given to a watch which has undergone precision tests and received a certificate from an official body (COSC).
Date
The day of the month, displayed in a window on a watch dial at the 3 or 6 o’clock position, or within a subdial at 9 o'clock.
Helium escape valve
Decompression system which allows helium to escape from inside the watch when the watch is worn for professional use in pressure chambers. (Long-term underwater work, crude oil exploration, etc.)
Limited edition
A series of watches whose production run is determined in advance of production and limited to a set number.
Screw-in crown
Self-locking crown, screwed into the tube of the case, used for highly water resistant divers' watches.
Self-winding chronometer, Co-Axial escapement movement with rhodium-plated finish.
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