Wittnauer AllProof AllProof (Staybrite/Gallet case)
Jimmie Mattern-era AllProof, c. 1933
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Specifications
- Case size
- 28 mm
- Case
- stainless steel (Staybrite), round
- Case maker
- Gallet (case supplier, per Staybrite Brevet Gallet case marking)
- Crystal
- acrylic
- Movement type
- Manual
- Dial
- silver
- Produced
- 1930–1936