![1956 Omega Chrono Tachymeter ref. 2276-1 cal. 320 1956 Omega Chrono Tachymeter ref. 2276-1 cal. 320](http://timeline.watch/wp-content/uploads/2016/01/Web_P1310565.jpg)
![P1310309 P1310309](http://timeline.watch/wp-content/uploads/2016/01/P1310309.jpg)
![P1310311 P1310311](http://timeline.watch/wp-content/uploads/2016/01/P1310311.jpg)
![P1310461 P1310461](http://timeline.watch/wp-content/uploads/2016/01/P1310461.jpg)
![P1310466 P1310466](http://timeline.watch/wp-content/uploads/2016/01/P1310466.jpg)
![P1310602 P1310602](http://timeline.watch/wp-content/uploads/2016/01/P1310602.jpg)
![P1310610 P1310610](http://timeline.watch/wp-content/uploads/2016/01/P1310610.jpg)
![P1310645 P1310645](http://timeline.watch/wp-content/uploads/2016/01/P1310645.jpg)
![P1310646 P1310646](http://timeline.watch/wp-content/uploads/2016/01/P1310646.jpg)
![P1310675 P1310675](http://timeline.watch/wp-content/uploads/2016/01/P1310675.jpg)
![56 Omega Chrono Tachymeter ref. 2276-1 cal. 320 56 Omega Chrono Tachymeter ref. 2276-1 cal. 320](http://timeline.watch/wp-content/uploads/2016/01/P1310810.jpg)
![P1310306 P1310306](http://timeline.watch/wp-content/uploads/2016/01/P1310306.jpg)
Omega Chrono Tachymeter
Nobel Prize in Physics: William Shockley, Walter H. Brattain, and John Bardeen (all US), for developing electronic transistor1956 Omega Chrono Tachymeter ref. 2276-1 cal. 320, 32.3mm. case.
The caliber 320 is basically a cal. 321 (Moonwatch) without the 12 hour counter.
A tachymeter scale measures how fast an object is moving. The scale can be found either on the dial or in the bezel. Most tachymeters start at 400 and end at 60, but some models can show different numbers.
Omega was founded in 1848 by Louis Brandt at the age of 23. The brand’s reputation grew fast and in 1895 the watches achieved a precision of 30 seconds a day.
By the turn of the 19th century Omega was one of Switzerland’s largest watch companies with 240,000 watches produced annually and employing 800 people.
Omega made its debut in sports during the Gordon Bennett international ballooning Cup in 1917; since then Omega has gone on to be the official timekeeper at 21 Olympic Games.
In 1936 Omega set the remarkable World precision record of 97.8 points at the Kew-Teddington observatory in England.
In 1957, with motorsport in mind, Omega launched the Speedmaster, which in 1965 was chosen by NASA as its official chronometer in Space. Four years later the Moonwatch was the first watch to be worn on the Moon, when on 21st July 1969 Neil Armstrong made his giant leap for mankind. Currently Omega belongs to the Swatch Group.