||A watch that has compensations
for temperature, positions, and isochronism.
||Shows time by rotating hands.
||A movement that is
"wound" by the motion of the wearer.
||The rim that covers the edge of
the dial and holds the crystal in place.
||The ring loop to which a chain or
watch fob may be attached.
||A stopwatch feature on a regular
watch. It can be started and stopped and returned to zero the measure short intervals of
||A movement certified by
maintaining precise time under rigorous testing.
||A feature in addition to telling
time, such as a calendar, moon phases, equinoxes, up and down dial, repeater, musical
chimes, alarms, etc.
||Auxiliary dials on a chronograph
that can mark seconds, tenths of seconds, half-hours, etc.
||A winding knob.
||The covering that protects the
dial, usually made of mineral glass, synthetic sapphire or plastic.
||The fact of the watch. Sometimes enameled and
hand-painted, and sometimes have gold markers or diamonds for numbers.
||Shows the time with a liquid crystal display.
||A pocket watch case with a cover that must be
opened to read the dial.
||Occurring at equal intervals of time. The
balance should not vary in its swing causing the watch to run any faster just after
winding than it will a day later. From "Isos", meaning equal and
"chronos", meaning time.
||A bearing of ruby or sapphire used for their
||"Energy is stored in a coiled mainspring
and released by an "escapement". It has at least 130 parts. Power is supplied
either by hand-winding or the motion of the wearer moving an oscillating weight.
||A watch that strikes or sounds the hours,
quarter hours and/or minutes on demand by moving a slide.
||The works of a watch exclusive of the case and
||The "neck" of a pocket watch, to
which are attached the bow and the crown.
||A calendar that automatically adjusts for
different lengths of months and leap year.
||Tells time with precision using an integrated
circuit, a miniature battery and a quartz oscillator that vibrates at a high frequency.
|Sweep second hand
||Second hand mounted at the center of the dial
on a mechanical watch, as opposed to an auxiliary dial or counter.
||A feature allowing the wearer to measure speed
by using elapsed time against a distance scale built into the watch.
||A chronograph scale allowing the measurement
of distance. For example, the wearer can figure the distance of a lightning strike by
pressing a button when the lightning is seen, and again when the thunder is heard, to
determine the storms distance.
||A watch with a revolving carriage that rotates
once a minute, changing the center of gravity in order to negate the effects of the watch
being in various positions.
||A moving bezel to help keep track of elapsed
time, as on a divers watch.
|Up and down dial
||A dial that shows how much of the mainspring
is spent and how far up or down it is.