Hamilton 505
ProbableBoth a production caliber in its own right and the service replacement for the 500. Its dual role is why caliber and case date so often disagree on these watches, and why that disagreement is not a finding.
Specifications
- Movement manufacturer
- Hamilton
- Production
- 1959–?
- Winding
- manual
Architecture
The revised electric caliber, with a reworked contact system addressing the 500's failure mode.
Related calibers
Succeeded by
Hamilton 500
References using this caliber
American Classic · 1959 →
Provenance of this record
Sources & Evidence
Secondary sourceCollector research
Hamilton collector research on the electric calibers, named models and case reproduction
Collector communities and specialist dealers
- Accessed
- 2026-08-19
Cited for
This referenceProbable
Last verified: Not yet reviewed