Longines 27M, Shock resist

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  Movement number: 8 220 942 (aprox: 1951).

Technical data LONGINES 27M

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  17 jewels, manual winding, sub second.
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  Size: 12''' 27,0 mm.
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  H: = 3.2 mm.
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  N: = 18.000 A/h.
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  Power reserve: 40 h.

Versions:

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  27.0: sub second, Breguet hairspring, H=4,25 mm.
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  27.0 S: sweep second, Breguet hairspring, H=5,45 mm.
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  27.0: shock resist, sub second, Breguet hairspring.
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  27.0 S: shock resist, sweep second, Breguet hairspring.
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  27M: sub second, flat hairspring, H=3,20 mm.
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  27MS: sweep second, flat hairspring, H=4,30 mm.
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  27M: shock resist, sub second, flat hairspring.
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  27MS: shock resist, sweep seccond, flat hairspring.