Very rare Swiss aluminium Chronometre de Bord Circa 1951

Nickel chronometer movement in square inspection case
–
A very rare Swiss nickel chronometer movement in a square aluminium inspection case, circa 1951. Plain square case, glazed on both sides. White enamel dial with Arabic hours, outer minute divisions and subsidiary seconds. Divided 3/4 plate movement, fitted with the world record-holding precision calibre 47.7 NN L, Guillaume gold screw compensation balance. Dial signed, movement signed and numbered.
–
Dimensions: 65 x 65 mm
–
Weight: 251 g
–
Signed: Omega Chronometre de Bord
–
This piece is one of 30 copies of the so-called Bord Chronometer version, which were only finalized in 1951.
–
The calibre 47.7 mm set world records for precision timekeeping in all categories at Kew-Teddington in 1933 as well as 1936. It is likely that these movements were produced in 1919/1920 in a series of 330 examples of which approximately 30 were finished by 1951. Today only 13 of those are recorded with designated movement numbers. They are listed and described on page 172 of Marco Richon’s book Omega, Bienne 2007.