Omega 20''' LO CCR NN
Tax included.
movement, no: 3 502 621 manufactured in 1911.
Data: Omega 20 LO CCR NN
-
19 jewels, open face caliber, sub second. -
Size: 20''' 44.8 mm. -
H: = 6.78 mm. -
N: = 18.000 A/h. -
Power reserve:
Versions: L = Lépine, O = Omega caliber, S = Savonette, A - DDR = Quality/Grade, NN = new negative wind/setting mechanism.
Grades:
-
A: 7 jewels, flat hairspring, compensating balance. -
B: 15 jewels, Breguet hairspring, compensating balance. -
C: 15 - 19 jewels, regulator adjuster with screw or snail-star wheel, 7-8 collets. -
CC: Fine C quality. -
CCC: Very fine CC quality for 19 and 20''' -
CCR: Extra fine CC quality for 19 and 20''' -
CCCR: 23 jewels, 15 collets for 19 and 20''', official chronometer. -
DDR: 23 jewels, 18 collets for 19 and 20''', official chronometer, after 1922 signed Very Best.