Defy Extreme through the years

Calibre

El Primero 9004: 2021–2026El Primero 9020: 2021–2026El Primero 3620: 2024–2026El Primero 3620 SC: 2024–2026

Diameter

45 mm: 2021–202642.5 mm: 2024–2026

Thickness

15.4 mm: 2021–2023, 202614.5 mm: 2021–2026

Generations

Shaded: new to the line.