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This is a wonderful description of the Geneva Seal by Doug Darter of the Breitling Forum



Here are the technical specifications and requirements, demanded of a watch, before it can be considered for a Geneva Seal. They are so stringent, that it is generally accepted, that most are rewarded to hand made, and hand finished in house movements. They are too demanding of a series production movement.
The Geneva Seal:

The standards required to earn the Geneva Seal concern not only aesthetics, but the functioning of the watch?s movement. For example: the surfaces of the components must be highly polished, because this reduces the friction within the movement. ?Sink? or concave chamfering must surroung all of the drilled holes, improving the bearings? capacity to retain lubricants. Furthermore, the ability to meet these exacting criteria proves that the individual manufacturers not only possess, but also apply rare and even unique know-know.

General Rules: The assembly and the regulation must be performed within the Canton of Geneva. A certificate that bears the signatures of the manufacturers must accompany any watch that?s submitted for testing. Each movement that hopes to earn a Geneva Seal hallmark must be numbered.

Technical Requirements: The manufacturing quality of all individual components of the caliber, including all individual parts of additional mechanisms, must correspond to the requirements of the Institutes for the Voluntary Testing of Genevan Watches. Parts made of steel must have polished edges, their flanks must be longitudinally polished, and all visible surfaces must be polished; heads of screws must be either polished or circularly grained; the circumference and slit of each screws?s head must be beveled.

1. Jeweling: In the vicinity of its train and escapement, each movement must be equipped with jewels (Rubies) set into polished holes. Jewels on the bridge side must be matte polished and their sinks must be polished. The specific requirements for jewel for the fourth wheel jewel are not stated.

2. Regulator Stud: The hairspring must be affixed by means of an inserted cover plate with a hairspring-stud that has a head and a round neck. An adjustable mobile stud-bearer is acceptable. Inset or split regulators are acceptable in combination with a holding assembly; this regulation does not apply to ultra-flat calibers, in which this assembly is not mandatory. Regulator assemblies with balances with variable moment of inertia measurers are acceptable as long as they fulfill the requirements specified under Point 1.

3. Gear Trains: Wheels in the train must be beveled above and below, and must have polished sinks. A single bevel (on the bridge side) is sufficient for a wheel whose thickness measures .15 mm or less. The pivot-shanks (little staffs) and the frontal planes of the pinions must be polished.

4. Escapement: The escape-wheel must be light: for large components, its thickness must not exceed .16mm; components less than 18mm in size must not exceed .13 mm in thickness; lockingfaces must be polished. Two fixed striking points must limit the angle through which it arcs from the pallet-arms; pins or studs are not permissible.

5. Shock Absorption: Movements with shock absorption are permissible.

6. Winding mechanism: The ratchet-wheel and crown wheel (transmission-wheel) must be worked completely according to the deposited patterns.

7. Springs: Wire springs are not permissible.

So, there you have it!!

Regards, Doug
 
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