37.9M

1934? – 1936?

Specifications

Lignes16.75 ‴
Mounting Diameter37.9
Thickness3.85
Frequency (vph)18,000
Jewels17
Power Reserve38
Hand Sizes1.70, 0.90, 0.26
PowerManual
ShapeRound
SizePocket

Notes

Pocket Watch Movement, M designation stands for 'mince', thin in French

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