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The Encyclopedia of Horology

Movement record · Switzerland

A. Schild 1130

Partially verified

Bridge calibre for wristwatch use

Technical specifications

Diameter
11 1/2 lignes (approx. 25.6 mm)
Height
Not recorded in the sources consulted
Jewels
17 (variants differ)
Frequency
18,000 vph (2.5 Hz)
Power reserve
Approx. 40 hours
Winding
Manual, stem wind
Setting
Pendant set
Escapement
Swiss lever
Balance
Monometallic balance with shock protection
Complications
Centre seconds in most versions

Identification features

  • A. Schild or 'AS' marking with a calibre number on the bridge
  • Very widely encountered in brand-signed watches of the period

Known variants

  • Date and no-date versions
  • Variants with differing jewel counts

Servicing notes

Cleaning, lubrication, mainspring and pivot work belong with a qualified watchmaker working from calibre-specific documentation. Conserve original parts: replacing a worn component with a modern substitute changes the object, and refinishing plates or dials destroys evidence.

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

Historical significance

Representative of the Swiss ébauche trade: one calibre sold under a great many brand names, so identification depends on the movement rather than the dial.

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. de Carle, D., Watch and Clock Encyclopedia
  2. Period trade material catalogues and calibre reference compilations (edition-dependent)
  3. Published manufacturer technical documentation where available

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