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Introducing the Zenith El Primero Chronomaster Open 1969 HERO Cup Edition (with live photos) - Monochrome Watches
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Hands-On: The Zenith El Primero Original 1969, One Of Few In-House Chronographs Under $10,000 - Hodinkee
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WTS] Zenith El Primero Tri Color 1969 38mm Chronograph Complete - 03.2150.400.69.c713 : r/Watchexchange
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