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1 (A)
The workmanship of all the caliber's components, including
those of additional mechanisms, must meet the requirements
of the office for optional inspection of Geneva watches.
1 (B)
Steel parts must have polished angles and their visible
surfaces smoothed down. Screw heads have to be polished,
with their slots and rims chamfered.
2
All movements must be provided on the train and escapement
with ruby jewels having polished holes. On the bridge
side, the jewels must be half frosted with polished
sinks. The end stone for the center wheel on the base
plate is not required.
3
The balance spring should be pinned up in a grooved
plate with a stud having a rounded collar and cap. Mobile
studs are allowed.
4
Split or fitted indexes are allowed with a holding system
except in extra-thin calibers where the holding system
is not required.
5
Regulating systems (balances) with variable radius of
gyration are allowed provided they comply with criteria
1 (A) and 1 (B).
6
The wheels of the going train have to be chamfered above
an below and have a polished sink. In wheels 0.15mm
thick or less, a single chamfer is allowed on the bridge
side.
7
In wheel assemblies, the pivot shanks and the faces
of the pinion leaves have to be polished.
8
The escape wheel has to be light, not more than 0.16mm
thick in large calibers and 0.13mm in calibers under
18mm, and its locking-faces have to be polished.
9
The angle traversed by the lever is to be limited by
fixed banking walls to the exclusion of pins or studs.
10
Movements fitted with shock proofing are accepted.
11
The ratchet wheel and the crown wheel should be finished
according to registered patterns.
12
Wire springs are not accepted.
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