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In 2010, Bulova introduced the Precisionist, a new type of quartz watch with a higher frequency crystal (262 144 Hz, eight times the industry standard 32 768 Hz) which is claimed to be accurate to ±10 seconds per year (0.32 ppm) and has a smooth sweeping seconds hand like automatic watches rather than the typical quartz watch seconds hand that ...
The watches could be produced by a subsidiary of their own in Switzerland or they could assemble the watches domestically. [2] The first Wittnauer's watch line was crafted starting from 1880, but the Wittnauer brand was formally established 1888 when Wittnauer took over Eugene Robert’s company and renamed it the "A. Wittnauer Company". [3]
It is also possible for quartz clocks and watches to have their quartz crystal oscillate at a higher frequency than 32 768 (= 2 15) Hz (high frequency quartz movements [4]) and/or generate digital pulses more than once per second, to drive a stepping motor powered second hand at a higher power of 2 than once every second, [5] but the electric ...
A watch is a timepiece carried or worn by a person. It is designed to keep a consistent movement despite the motions caused by the person's activities. A wristwatch is designed to be worn around the wrist, attached by a watch strap or other type of bracelet, including metal bands or leather straps.
A balance wheel, or balance, is the timekeeping device used in mechanical watches and small clocks, analogous to the pendulum in a pendulum clock.It is a weighted wheel that rotates back and forth, being returned toward its center position by a spiral torsion spring, known as the balance spring or hairspring.
The "Diamond Award" granted by the Recording Industry Association of America (RIAA) recognizes 10 million units sold in the United States. Below are certification thresholds for the United States, United Kingdom, Canada and France. The numbers in the tables are in terms of "units", where a unit represents one sale or one shipment of a given medium.
Tidal diamonds are symbols on British admiralty charts and others [a] that indicate the direction and speed of tidal streams. The symbols consist of a letter of the ISO basic Latin alphabet in a rhombus, printed in purple ink. [b] On any particular chart each tidal diamond will have a unique letter starting from "A" and continuing ...
Bollinger Bands consist of an N-period moving average (MA), an upper band at K times an N-period standard deviation above the moving average (MA + Kσ), and a lower band at K times an N-period standard deviation below the moving average (MA − Kσ). The chart thus expresses arbitrary choices or assumptions of the user, and is not strictly ...