Lot 386

Omega "Chronometre de Bord", Movement No. 5783186, Case No. 5896614, Cal. 47.7, 120 x 105 x 120 mm, circa 1919
A fine deck chronometer with lever escapement
Case: mahogany. Dial: silver. Movm.: 2/3 plate movement, balance stop device, gold screw compensation balance.
Calibers 21''' and 47.7 mm - symbols of high Omega precision
The exceptional chronometer caliber 21''' was launched in 360 examples in 1912 in the variations "de Bord" and "observatory". The movement numbers are as follows: 3999776 to 4000135. With its excellent test results quickly propelled Omega amongst the top winners in the precision contests. The new movement was not only designed to be a contestant in the tests but also to be available as a 1st class chronometer for the customers. Caliber 21''' was slightly modified in 1919 and the famous caliber 21,5 ''' NN bull or 47.7 NN L came into being; this caliber established the phenomenal precision world records in all categories in 1933 and 1936 at the London Observatory of Kew Teddington. Caliber 47.7 mm was presumably created between 1919 and 1920 in a series of 300. The movement numbers are as follows: 5783102 to 5783401.
Source: "Omega" by Marco Richon, Biel 2007 page 172.

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