Movement

Calibre 23M

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1939 – 1947

Lignes 10.5
Mounting Diameter 23.3
Thickness 3
Frequency (vph) 18,000
Jewels 17
Power Reserve 44
Hand Sizes 1.32, 0.72, 0.20
Complication Subsidiary Seconds
Power Manual
Shape Round
Size Medium
5172 ⤢ enlarge

The 23M in a Ref. 5172

5172
23M Movement Detail

Notes

Derived from the 10.68Z and 23O, M designation stands for 'mince', thin in French. Visually similar to the 23O but thinner, intended for use in gold cased watches, it would have a higher level of finishing than the 10.68Z.

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