[WTS] Zenith El Primero “Open Heart” — Ref. 03.0520.4021 — White Dial — Full Set / Hard-to-Find

Zenith El Primero “Open Heart” — Ref. 03.0520.4021 — White Dial — Full Set / Hard-to-Find

Zenith - 03.0520.4021 · $3,190
This Zenith El Primero 'Open Heart' features a rare white dial and an iconic high-beat chronograph movement with an open-heart design, allowing you to see the escapement working.

  • Condition: Very Good
  • Diameter: ~42mm
  • Movement Frequency: 36,000 vph
Posted at
Feb 24, 2026, 8:12 PM
Expired
Zenith Grande Class Open El Primero Chrono Power Reserve 03.0520.4021, Black B&P

Zenith Grande Class Open El Primero Chrono Power Reserve 03.0520.4021, Black B&P

Zenith - 03.0520.4021 · $3,595
This Zenith Grande Class Open El Primero Chronograph features an in-house movement, chronograph function, power reserve indicator, and is water resistant to 50m.

  • Condition: Good condition, some wear on the strap and a small blemish on the sapphire crystal
  • Movement: Automatic, in-house Zenith 4021H
  • Base movement: Zenith El Primero 400
  • Alternations per hour: 36,000
Posted at
Mar 1, 2025, 2:41 AM
Active
Zenith Grande Class Open El Primero Chronograph, Power Reserve 03.0520.4021, Black Dial, Boxes and Papers.

Zenith Grande Class Open El Primero Chronograph, Power Reserve 03.0520.4021, Black Dial, Boxes and Papers.

Zenith - 03.0520.4021 · $3,595
A Zenith Grande Class Open El Primero Chronograph with a black dial, automatic movement, and power reserve indicator.

  • Condition: Good condition, some wear on strap and blemish on sapphire crystal
  • Case diameter: 44mm
  • Case thickness: 12mm
  • Lug width: 22mm
Posted at
Mar 1, 2025, 2:46 AM
Expired