El Primero 01.0040.400
c. 1988–c. 1991
Years estimated from 6 dated marketplace listings; seller-stated, unverified.
Variants
No variants documented yet.
Reference specifications
- Brand
- Zenith
- Model
- El Primero
- Reference
- 01.0040.400
- Production
- c. 1988–c. 1991
- Case diameter
- 40 mm
Specs shared by all variants. Variant pages show where a variant differs.