Omega 12''' SB (12 SOB)

Omega 12''' SB (12 SOB)
Omega 12''' SB (12 SOB)
Brand: Omega
Product Code: 12SOB
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The Omega 12''' Lépine or Savonette was introduced in 1898 and delivered in quality A to C.

Example movement number: 4 759 416 manufactured in aprox: 1914.

Data: Omega 12''' SB (12 SOB).

  • 15 jewels, manual wind, savonette caliber, sub second.
  • Size: 12'''  26.60 mm.
  • H: = 4.60 mm.
  • N: = 18.000 A/h. Cut bimetallic balance, Breguet hairspring.
  • Power reserve: 42 h.
  • Mainspring: 1,40 x 10,5 - 0,12 - 360 mm.

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.

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