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The Encyclopedia of Horology

Movement record · United States

Illinois Bunn Special

Partially verified

Standard

Technical specifications

Diameter
16 size
Height
Not recorded
Jewels
21-24
Frequency
18000 vph
Power reserve
60 h
Winding
Manual
Setting
Stem
Escapement
Lever
Balance
Screw
Complications
None

Identification features

    Known variants

      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

      Motor barrel classic

      Photographs

      ILLINOIS BUNN SPECIAL RAILROAD WATCH – 1923
      ILLINOIS BUNN SPECIAL RAILROAD WATCH – 1923 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record
      ILLINOIS BUNN SPECIAL RAILROAD WATCH – 1923
      ILLINOIS BUNN SPECIAL RAILROAD WATCH – 1923 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record
      ILLINOIS BUNN SPECIAL RAILROAD WATCH – 1923
      ILLINOIS BUNN SPECIAL RAILROAD WATCH – 1923 — WatchMuseum.org, © WatchMuseum.org, used with permission. WatchMuseum.org catalogue record

      Photographs are illustrative examples of the type, not necessarily the exact object described. Verify details against the source file page.

      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.