Omega 240-1100, Ratchet wheel

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  New Omega original part in factory packaging.

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  Fits cal: R13.5, 240, 241, 242, 243, 244, 245, 250, 251, 252

Data: Omega 244 (R 13.5 PC AM 17 p).

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  17 jewels, manual wind.
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  Size: 17.50 x 13.50 mm.
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  H: = 3.25 mm.
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  N: = 21 600 A/h.
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  Power reserve: 46 h.

Versions:

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  R13,5: until 1949, 15 jewels (1939).
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  240: after 1949, 15 jewels (1949).
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  241: 15 jewels, antimagnetic (1949).
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  242: 17 jewels (1944).
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  243: 17 jewels, antimagnetic (1950).
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  244: 17 jewels, incabloc (1950).
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  245: 17 jewels, flat balance ring, 19800 A/h.
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  R13,5SC: until 1949, 17 jewels, center second (1940).
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  250: after 1949, 17 jewels, center second (1949).
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  251: 17 jewels, antimagnetic, center second (1950).
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  252: 17 jewels, antimagnetic, center second, incabloc (1951).