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The Encyclopedia of Horology

Movement record · France

Lip calibre R25

Needs research

A French manual-winding wristwatch calibre from the Besançon factory, made in commercial grades for Lip's own watches.

Technical specifications

Diameter
Not recorded in a source consulted here
Height
Not recorded in a source consulted here
Jewels
Made in several jewel counts
Frequency
18,000 vibrations per hour on standard versions
Power reserve
Approximately one day
Winding
Manual winding
Setting
Crown setting
Escapement
Swiss-pattern lever
Balance
Jewelled
Complications
Sub-seconds or centre seconds depending on version

Identification features

  • Signed Lip with the calibre reference
  • French case and movement marks on domestic-market examples

Known variants

  • Jewel-count and seconds-layout variations

Servicing notes

Parts are scarce outside France; a competent general watchmaker can service the movement itself.

General guidance only. Antique movements should be serviced by a qualified watchmaker.

Historical significance

Represents French wristwatch manufacture at Besançon, a tradition frequently overlooked beside its Swiss neighbours.

Diagram

top plate or bridgespillar platebalance and cockwheel train between the plates
Schematic: plate and bridge layout. An outline schematic drawn to show the arrangement of the parts discussed here. It is not a dimensioned working drawing and does not depict a particular maker's calibre.

Sources & references

  1. Lip company history and French horological collector references
  2. Detailed dimensions and production dates for this calibre were not confirmed in a reliable source consulted here; some widely circulated online specifications are self-flagged as unverified.

Where sources disagree, the disagreement is stated rather than resolved silently.