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The Encyclopedia of Horology

Movement record · Germany

Junghans J80

Partially verified

Manual German wristwatch calibre

Technical specifications

Diameter
Approx. 25 mm
Height
Not recorded in the sources consulted
Jewels
17
Frequency
18,000 vph (2.5 Hz)
Power reserve
Approx. 40 hours
Winding
Manual, stem wind
Setting
Pendant set
Escapement
Swiss-style lever
Balance
Monometallic balance
Complications
Subsidiary or centre seconds by version

Identification features

  • Junghans calibre marking
  • German rather than Swiss bridge conventions

Known variants

  • Variants across the J80 family

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 substantial mid-century German wristwatch manufacture outside Glashütte.

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.