Movement record · United States
South Bend Grade 227
Partially verifiedHigh-grade bridge railroad movement
Technical specifications
- Diameter
- 16 size
- Height
- Not recorded in the sources consulted
- Jewels
- 21
- Frequency
- 18,000 vph (2.5 Hz)
- Power reserve
- Approx. 40 hours
- Winding
- Stem wind
- Setting
- Lever set
- Escapement
- Swiss lever
- Balance
- Compensation balance with micrometric regulation
- Complications
- Subsidiary seconds
Identification features
- Grade number marked on the movement
- Notably fine finishing for a comparatively short-lived factory
Known variants
- Studebaker-branded grades
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
Evidence that smaller American factories could match the leading firms' railroad grades, even without their longevity.
Related photographs
No confidently matched photograph of this subject has been found yet. These photographs show a closely related record, and are not examples of the type described on this page.
Sources & references
- de Carle, D., Watch and Clock Encyclopedia
- Period trade material catalogues and calibre reference compilations (edition-dependent)
- Published manufacturer technical documentation where available
Where sources disagree, the disagreement is stated rather than resolved silently.