Patek Philippe 27 SC, Spring for yoke, no: 440

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  New Patek Philippe genuine part.

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  Fits cal: 27 SC

Data Patek Philippe cal: 27 SC

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  18 jewels, manual wind, hour, minute and center second display.
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  S: = 26.75 mm.
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  H: = 4.95 mm.
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  N: = 18.000 A/h.
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  Power reserve:
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  Mainspring: Height: 1.42 mm, Length: 248 mm, Thickness: 0.115 mm.