4.12.08

T

Tachometer: instrument for measuring speed over a measured distance. It is also called tachymeter. Time an event that takes less than 1 minute. The scale on the Tachometer will tell you how many of those events will occur in 1 hour.
e.g.: A racing car covers 1 mile in 30 seconds. The sweep seconds hand, when stopped at the end of the mile, would point to 120 on the tachometer. The average speed of the car is 120 m.p.h.






Tachymeter: A feature found on some chronograph watches, a tachymeter (also called a "tachometer") measures the speed at which the wearer has travelled over a measured distance.






Tank watch: A rectangular watch designed by Louis Cartier. The bars along the sides of the watch were inspired by the tracks of tanks used in World War 1.







Telemeter: A telemeter determines the distance of an object from the observer by measuring how long it takes sound to travel that distance. Like a tachymeter (see "tachymeter"), it consists of a stopwatch, or chronograph, and a special scale, usually on the outermost edge of the watch face.




Titanium: A metal that is used for some watch cases and bracelets. Titanium is much stronger and lighter than stainless steel. Titanium is also hypo-allergenic.




Tonneau watch: A watch shaped like a barrel, with two convex sides.




Tourbillion: A device, invented by Breguet in 1801, in which the escapement is mounted in a small revolving cage as a means of overcoming the effects of gravity on the precision on a mechanical timepiece.






Tricompax: A chronograph with 3 sub dials, traditionally at 3, 6 and 9 o'clock, most often displaying seconds, minutes and hours elapsed.







Triple Calendar - a dial that displays the day, date and month.
Tritium - a slightly radio-active substance that collects light and is used to allow the hands or hour markers to glow in the dark. The radiation is so low that there is no health risk. Watches bearing tritium must be marked as such, with the letter T on the dial near 6 o’clock.







Two tone – Most often 18K gold and steel pr white gold, two tone refers to a multicoloured watch design.














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