Patek Philippe 23-300, Main spring, no: 770

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  New Patek Philippe genuine part. Not in factory packaging.

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  Fits cal. 23-300, 23-300PM

Data Patek Philippe cal: 23-300, 23-300PM (adjustable stud carrier).

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  18 jewels, manual wind, hour and minute (seconds) display.
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  S: = 22.70 mm.
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  H: = 3.00 mm.
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  N: = 19.800 A/h.
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  Power reserve:
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  Mainspring: Height: 0.97 mm, Length: 300 mm, Thickness: 0.108 mm.