Ladies style watch with a thin, elongated face; usually rectangular in shape but may be oval.
The regulating organ of the watch, vibrating on a spiral hairspring. Lengthening or shortening the balance-spring makes the balance-wheel go faster or slower to advance or retard the watch.
In wristwatch-cases, a thin metal rod fixed between the horns, for attaching the wristlet .
Thin cylindrical box containing the mainspring of a watch. The toothed rim of the barrel drives the train.
Any non-precious metal.
Device that converts chemical energy into electricity. Most watch batteries are silver oxide type delivering 1.5 volts. Much longer-lasting lithium batteries are 3 volt.
The minimum period of a time that a battery will continue to provide power to run the watch. Life begins at the point of manufacture when the factory initially installs the battery.
The surfacing ring on the watch that surrounds and holds the crystal in place. A rotational ratchet bezel moves in some sport watches as part of the timing device. If rotating bezels are bi-directional, able to move clockwise or anti-clockwise, they can assist in the calculations of elapsed times.
Flexible metal bonds consisting of assembled links, usually in the same style as the case. detachable links change the length of the bracelet.
Copper and zinc alloy used to make the main plate and bridge wheels in the movement.
Complimentary part fixed to the main plate to form the frame of a watch movement. The other parts are mounted inside the frame part (part of the "bauche").
Usually matching the case, it attaches the two parts of the leather strap around the wrist.
Push piece controls, usually at 2 o'clock and /or 4 o'clock on the dial to control special functions such as the chronograph or the alarm.
