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Seiko Automatic Chronograph (Ref. 6138-0012) "UFO", 1978 — view 1 of 6
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Seiko Automatic Chronograph (Ref. 6138-0012) "UFO", 1978

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Seiko (maker)
Date
1978
Country of origin
Japan
Object type
Wristwatch
Stock no.
SKO61380012
Credit line
Dealer listing, Craft & Tailored (SKO61380012)
Catalogue title (original)
1978 Seiko Automatic Chronograph (Ref. 6138-0012) "UFO" (English)

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Record summary

Catalogued by Craft & Tailored (dealer), Los Angeles (stock number SKO61380012), this is a wristwatch by Seiko, made in Japan, dated 1978. 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

During the 1970s, Seiko produced a variety of different chronograph watches, and these timepieces have become favorites among today’s collectors due to their funky designs and of-the-era case shapes. One of the most popular is the Seiko Chronograph ref. 6138, which is best known by its “UFO” nickname due to its large, rounded case that lacks any type of lugs protruding from its sides. In addition to its “UFO” nickname, the Seiko ref. 6138 chronograph is also sometimes called the "Big Eye/Small Eye” due to its asymmetrically sized sub-dials, and the model even appeared under the “Yachtman” name in one American distributor’s advertisement at the time. The Seiko UFO offers a distinctly sporty and racing-inspired aesthetic, which is emblematic of chronograph watches produced during the 1970s. Its unique case shape and distinct design make it instantly recognizable, and it can be spotted on the wrist of French acting legend Jean-Paul Belmondo in his 1972 film, La Magnifique (more famously known by its English title , The Man From Acapulco ). SPECS Stock # SKO61380012 Brand Seiko Style Automatic Chronograph "UFO" Model 6138-0012 Serial 85XXXX Size Men's Material Stainless Steel Dial Black Millimeters 44 Strap 2pc Leather Strap CASE & BRACELET The wonderfully large and retro UFO-style case appears to have been lightly polished in the past and shows minimal signs of previous wear. The original tachymeter bezel is in excellent condition with light signs of use and remains deep black in color. The case retains its original pushers and crown. The case back retains all of the factory markings in visible condition, though some fading is present from wear. The watch comes supplied on a 2pc leather strap. DIAL & HANDS The original matte black dial is in wonderful vintage condition, featuring honest age and patina, most notably in the sub-dials, making for a charming one-of-a-kind aesthetic. The lume on the dial appears to be mostly missing, though the markers remain in place. The hands appear to be OEM service units and remain in perfect condition. ACCESSORIES The watch is keeping time perfectly, but the service history is unknown. A movement service can be purchased 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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