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Horology P
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| Pallet |
The central component of the escapement, also known
as the lever, pallet lever, or pallet fork. It alternately locks and
receives impulse from the escape wheel and is unlocked by and provides
impulse to the balance via the roller jewel. |
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| Pair-cased watch |
A watch in which the movement is housed in an inner case which
itself is then contained in a second, outer, case.
In the past, the inner case was called a box, the outer case was
called pair-case or outer case.
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| Patina |
Discoloration of a dial or hands which is usually due
to aging. |
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| Perlage |
A decorative surface treatment of small overlapping
circles applied primarily to bridges or the visible portions of the
main plate. |
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| Perpetual Calendar |
A complication that adjusts itself automatically for different
month lengths and leap years.
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| Pilot's Watch |
Refer to Aviator's watch |
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| Pinion |
The smaller, geared portion of a wheel; pinions have
"eaves" where wheels have "teeth. |
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| Plate |
Often the main plate, the primary piece supporting the movement's
various parts and bridges. The bottom side of a plate is the dial
side, the top side is the bridge side.
Sometimes the word plate is used interchangeably with bridge or
sometimes refers to smaller, thin coverings or fixtures in a movement.
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| Poincon de Genève |
A certification established in 1886 by the state of Geneva to recognize
the superior manufacture of certain watch calibers. C.O.S.C is based
on the movement's accuracy; however, Poincon de Genève represents
the quality of materials, finishes, ...
The central requirement is that the movement must be assembled
and set in Geneva by a Geneva-based company. Poincon de Genève
is a prestigious quality label, the privilege of a few Haute Horlogerie
manufacturers.
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| Pomme Hands |
Refer to Breguet Hands |
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| Power Reserve |
The lenght of time a watch can run from fully wound
until it stops. |
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| Power Reserve Indicator |
A sub-dial shows how much power remains before a watch
stops running. |
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| Pulsometer |
A scale on the dial or bezel of a watch that, with the
second hand, can be used to measure a person's pulse rate. |
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| Pump winding |
An early form of keyless winding in pocket watches by pushing and
pulling a winding shaft in and out of the case. |
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| Pusher |
A button on a watchcase that activates a function like
the chronograph start / stop or reset, an alarm on / off switch, or
a quick-set date corrector. |
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