
Wristwatches · Wristwatch
Zenith El Primero Chronograph "Cover Girl" (Ref. A3818) Blue Dial, 1970s
- Maker / attribution
- Zenith (maker)
- Date
- 1970s
- Historical period
- Quartz Revolution (1969 – 1990)
- Country of origin
- Switzerland
- Object type
- Wristwatch
- Stock no.
- ZEPA3818
- Credit line
- Dealer listing, Craft & Tailored (ZEPA3818)
- Catalogue title (original)
- 1970s Zenith El Primero Chronograph "Cover Girl" (Ref. A3818) Blue Dial (English)
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Record summary
Catalogued by Craft & Tailored (dealer), Los Angeles (stock number ZEPA3818), this is a wristwatch by Zenith, made in Switzerland, dated 1970s. The Atlas places it in the Quartz Revolution period (1969 – 1990) of its Wristwatches collection. The record is illustrated with 6 photographs.
Assembled from the source record's structured fields. Dates and attributions are given as the source states them; where a field is missing the Atlas leaves it blank rather than estimating.
Catalogue description
Dealer description — Craft & Tailored
The Zenith El Primero chronographs were unlike any other chronograph when it was released both aesthetically and mechanically. On January 10th, 1969, Zenith introduced the world's first automatic chronograph caliber, the 3019PHC El Primero, beating out Seiko and the Chronomatic group consisting of Breitling, Heuer, Hamilton, and Büren in the competition to build the first automatic chronograph. What makes the cal. 3019PHC movement a true legend and icon is the number of watches outside of the Zenith brand that employed this legendary movement, most notable of which was the first self-winding Rolex Daytona, aka the "Zenith Daytona". Rolex used a modified version of El Primero until the brand released its own in-house automatic chronograph movement in the year 2000. 3019PHC El Primero movement The Zenith ref. A3818 is one of the most recognizable and beloved references from the brand and has even been reintroduced for the modern era. This model is charismatically nicknamed "Cover Girl" for being featured as the cover image in the book Zenith: Swiss Watch Manufacture Since 1865 by Manfred Rössler. SPECS Stock # ZEPA3818 Brand Zenith Style El Primero Chronograph "Cover Girl" Model 3818 Serial 86XXXXX Size Men's Material Stainless Steel Dial Blue Millimeters 37.5 Strap 2pc Handmade Leather Strap CASE & BRACELET The strong geometrical case is in excellent condition, showing minimal evidence of previous polishing with the original angles and case chamfers intact and still crisp. The case retains its original crown and pump pushers. The case back features light wear with tool marks and is adorned with the Zenith logo medallion with the case serial remaining fully present. The watch comes supplied on a 2pc handmade leather strap. DIAL & HANDS The original blue sunburst dial is in exceptional vintage condition, showing only nominal aging which is most present around the outer sub-dial rings but is minimal for this color dial from this era. The silver text on the dial and in the outer timing ring all remain fully present and in excellent condition. The sub-dials are in remarkable condition with nominal aging present. The tritium lume plots have achieved a lovely golden-yellow patina and show no degradation when inspected under UV light. The original tritium hands, including the red chronograph hand, match the dial lume almost perfectly. Under UV light inspection the hands display no degradation. ACCESSORIES None. The watch is keeping time, but the service history is unknown. A movement service can be provided upon request.
Historical context
Quartz Revolution (1969 – 1990)
Seiko's Astron begins mass quartz timekeeping; traditional industries contract sharply.
Quartz and digital watches transformed the market after 1969. Swiss employment collapsed, Japanese and Hong Kong production soared, and the Swatch (1983) helped the Swiss industry recover; mechanical watches survived as luxury goods.
Read the period in the timelineMore wristwatches from this periodEarlier: Modern Mechanical Horology
Atlas type guide
Chronographs and split-seconds watches
A chronograph is a watch with an additional seconds hand that can be started, stopped and returned to zero independently of the timekeeping. Louis Moinet built an early example in 1816 and Nicolas Rieussec a recording 'chronographe' in 1821; Adolphe Nicole's heart-shaped reset cam (patented 1862) made the modern return-to-zero possible. Split-seconds (rattrapante) chronographs add a second hand that can be stopped for intermediate times; flyback chronographs restart instantly.
Chronographs were essential tools for doctors (pulsometer scales), artillery (telemeter), engineers and sport. In wristwatches, Valjoux, Venus, Lemania and later the automatic chronographs of 1969 (Zenith El Primero, the Chronomatic Calibre 11 group and Seiko 6139) are milestones.
What to look for
- Push-pieces on the case band or a single button in the crown (monopusher).
- Subsidiary registers for minutes and hours; tachymeter, telemeter or pulsometer scales.
- Column wheel versus cam control visible in the movement.
- Calibre markings of specialist makers (Valjoux, Lemania, Venus, Landeron).
Dating clues
- Pocket chronographs with heart cam reset: after 1862.
- Wrist chronographs: from c. 1910; two-button designs from the 1930s.
- Automatic chronographs: from 1969.
General guidance written by the Atlas editors about this kind of object. It is not a statement about this particular piece; for that, rely on the source record above and on physical examination.
Read next:Flyback chronographChronograph
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