Zenith El Primero

About this reference

The Zenith El Primero A3817 was produced in 1971 with a total production run of approximately 1,000 units. Collectors prioritize this reference because it combines the tonneau-shaped stainless steel case of the A384 with the tri-color sub-dial aesthetic of the A386. It houses the high-frequency caliber 3019 PHC automatic chronograph movement. A distinguishing technical feature is the presence of a blue sub-seconds track with a pyramid-style scale, which is unique to this specific reference. On the secondary market, prices typically range from $12,000 to $20,000 depending on the condition and the presence of the original Gay Frères ladder bracelet. A notable production detail is that the A3817 is one of the rarest of the original 1969-1971 El Primero references, often considered a transitional design between the brand’s early experimental cases and its most recognized dial configurations.