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Black Diamond-Like Coated hardened stainless steel.

Domed crystal

A convex pane of clear glass-like material (usually artificial sapphire) covering a watch’s dial.


Energy from the mainspring is restrained by the escapement to help control the gear train. At the same time the escapement provides further energy to the balance spring where unavoidable losses due to friction are compensated. Modern wristwatches usually contain the pallet escapement which consists of the escape wheel and its pinion.

Faraday cage

A unique mechanism developed by Bremont consisting of a soft-iron housing in which the movement in enclosed, routing any potentially harmful magnetic fields around the movement.


A shock absorption system used in pocket and wristwatches.

Index (Adjustment)

A device which can be used to set the rate of a watch by changing the effective length of the balance spring in the oscillation system.


To minimise friction in the most important bearings, jewels are fixed to the anchor pallets and ellipse. A movement with a large number of jewels does not necessarily mean that the movement is of particularly high quality.

Mechanical watches

Watches that are powered by a mainspring whereby the oscillating system runs purely on a mechanical basis, e.g. balance or pendulum.

Mohs hardness scale

This scale was devised to divide the whole spectrum of harness using a scale of 1 to 10. “1” stands for a very soft material (talcum) and “10” for the hardest material (diamond).

Power reserve

The maximum amount of time over which a mechanical movement can continue to run after its mainspring has been fully wound.