Specifications define the level of finish required for the movement and its decoration. These were discussed and approved by a group of experts that united specialists in research, teaching and production. Compliance with them takes the form of a preliminary examination at the stage when the piece consists of a kit of parts.
Metal, traditional ceramics, precious or avant-garde materials must be used.
The use of plastic materials is prohibited.
Exclusive finishing :
A decorative motif must be visible on the maximum thickness of the plate or the visible part of the bridge, by a process of selecting the zone to be decorated, as well as in the main recesses. The parts must not show any rough sharp angles and the sinks must be polished. No visible burrs must be present and the functional zones of the steel parts must be polished. The screw-heads must be flat and polished, bevelled on the slot and the rim. The shaped parts must be bevelled, polished, and where possible have lines drawn out with file strokes.
Manufacturing procedures for decorations may be either mechanical or manual.
Operations carried out in bulk only are not tolerated.
Surface treatment :
The galvanic plating of parts is not mandatory; if it is applied, it must enhance the technical or aesthetic characteristics of the movement. Nickel-plating alone is not permitted, but is authorised on steel parts requiring protection against oxidation.
The technical department of the Foundation tests the kit of spare parts, and verifies the existence of COSC certification and prior submission of the movement to the Chronofiable tests. In case of doubt, the Technical Committee (Chairman and assessors) is called upon.