I'm torn between the Zenith El Primero and the Omega Speedmaster. Most iconic chronograph movement vs most iconic chronograph. Which would you choose? - Quora
REVIEW: Zenith El Primero Chronographs - 42 mm vs. 38 mm
Hands-On: The Zenith El Primero Chronomaster 38mm - Hodinkee
Zenith Chronomaster Original El Primero 38mm Mens Watch 03.3200.3600/69.M3200 | Mayors
Cool or not cool? Zenith presents the El Primero 410 Limited Edition – Watch-Insider.com