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Tachymeter scale on a Citizen watch bezel. A tachymeter (pronounced / t æ ˈ k ɪ m ə t ər /) is a scale sometimes inscribed around the rim of an analog watch with a chronograph.It can be used to conveniently compute the frequency in inverse-hours of an event of a known second-defined period, such as speed (distance over hours) based on travel time (distance over speed), or measure distance ...
The term chronograph comes from the Greek χρονογράφος (khronográphos 'time recording'), from χρόνος (khrónos 'time') and γράφω (gráphō 'to write'). '). Early versions of the chronograph are the only ones that actually used any "writing": marking the dial with a small pen attached to the index so that the length of the pen mark would indicate how much time had
So, during his third lunar walk, he used his backup Bulova watch. The Bulova Chronograph Model #88510/01 is the only privately owned watch to have been worn on the lunar surface. There are images of Scott wearing the watch, when he saluted the American flag on the Moon, with the Hadley Delta expanse in the background. The watch shows ...
A chronograph is a watch with an added duration timer, often a stopwatch complication (as explained above), while a chronometer watch is a timepiece that has met an industry-standard test for performance under pre-defined conditions: a chronometer is a high quality mechanical or a thermo-compensated movement that has been tested and certified ...
Omega cal. 321 movement. The Speedmaster was not originally designed for space exploration. Instead, it was introduced in 1957 as a sport and racing chronograph following on from the early chronographs of the 1920s and 1930s, including the Omega 28.9 chronograph, which was Omega's first small wrist chronograph, complementing Omega's position as the official timekeeper for the Olympic Games.
A Patek Philippe pocket watch. This list of most expensive watches sold at auction documents the watches sold at auction worldwide for at least 1.5 million US dollars.The final price listed is the total price paid by the buyer converted to US dollars, according to the currency exchange rate at the time of auction.
The two-way star should still be in high school and yet can reasonably claim to be the best player in college hoops, averaging 19.5 points, 7.7 rebounds and 4 assists for one of the top teams in ...
It also featured a tachymeter scale on the outer chapter ring, and a telemeter chronograph scale on the inner chapter ring. [9] Reference 6234 was succeeded by Reference 6238, which dropped the telemeter scale and updated its appearance to include many features that would be adopted for its successor Reference 6239. [9]