Omega 20''' LOB
Tax included.
The Omega 20''' was available from 1898 as Lépine or Savonette in grades A - C, D, DDR, BULL. The parts are the same as for the Omega 19'''
Example movement:
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No: 4 125 030, signed Omega on the train wheel bridge and plate. Manufactured in aprox: 1914
Data: Omega 20''' LOB
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15 jewels, open face caliber, sub second. -
Size: 20''' 44.8 mm. -
H: = 6.85 mm. -
N: = 18.000 A/h. -
Power reserve: 38 h. -
Mainspring: 2,60 x 18 - 0,20 - 570 mm, AT Double brace and hole.
Versions: L = Lépine, O = Omega caliber, S = Savonette, A - DDR = Quality/Grade, NN = new negative wind/setting mechanism.
Grades:
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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.