Omega 17'''LOB

• Not for sale!

Manufactured from 1898 in quality A - C.

movement, no: 5 497 020 manufactured in aprox: 1920

Data: Omega 17'''LOB

• 15 jewels, open face caliber, sub second.
• Size: 18'''  37.70 mm.
• H: = 5.10 mm.
• N: = 18.000 A/h.
• Power reserve: -- h.
• Mainspring: 1,80 x 15 - 0,18 - 460 AT = Double brace and hole.

Versions: L = Lépine, O = Omega caliber, S = Savonette, A - C = 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.

Versions:

• 17'''LOA:      7 jewels, flat hairspring. 1898 - 1906
• 17'''LOB:    15 jewels, Breguet hairpspring. 1898 - 1932
• 17'''LOC:    15-19 jewels, Breguet hairspring, regulator, geneva stopwork.
  
• 17'''BULL:   21 jewels, Chronometre.