Omega 1250-9031, Transistor unit

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  New Omega original part in factory packaging.

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  Fits Omega cal: 1250, 1255, 1260
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  Fits ESA cal: 9162, 9164

Technical data Omega 1250 (ESA 9162).

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  12 Jewels, electronically controlled tuning fork, sweep second, quickset date.
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  S: = 13''' 29.0 mm.
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  H: = 4.85 mm.
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  N: = 300 Hz.
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  Battery: original (mercury) 343, replacement: 344 (silver oxide).

Versions:

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  1250: date.
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  1255: chronograph, day, date.
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  1260: day, date.

How to check the transistor units coils, last picture.

The resistance between contacts:

3 and 4: 7 K Ohm.

1 and 2: 1,5 K Ohm.

Versions:

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  9162: date.
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  9164: day, date.