FHF 26 (12-13'''), Balance staff, DCN: 1911

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  DCN no: 1911
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  Fits cal: 26, 261, 262, 263, 264, 265, 266, 267 (12 - 13''').

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  A: 322
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  B: 150
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  F: 70
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  G: 100
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  H: 38

Versions with height: 3.85 mm.

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  26: 12''' Base caliber.
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  261: 13'''
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  261-2: 13''' date.
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  261-2N: 13''' date, minor mod.
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  262: 12'''
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  263: 12'''
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  264: 12'''
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  265: 12'''
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  266: 12'''
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  267: 12'''

Versions with height: 3.45 mm.

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  27: 12'''
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  271: 13'''
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  271-2: 13''' date.