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Seiko Chronograph (Ref. 6138-0011) "UFO", 1977 — view 1 of 6
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Wristwatches · Wristwatch

Seiko Chronograph (Ref. 6138-0011) "UFO", 1977

DocumentedDocumented from a dealer's listing; attribution and date as stated by the dealer.
Maker / attribution
Seiko (maker)
Date
1977
Country of origin
Japan
Object type
Wristwatch
Stock no.
SKO61380017-3
Credit line
Dealer listing, Craft & Tailored (SKO61380017-3)
Catalogue title (original)
1977 Seiko Chronograph (Ref. 6138-0011) "UFO" (English)

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Record summary

Catalogued by Craft & Tailored (dealer), Los Angeles (stock number SKO61380017-3), this is a wristwatch by Seiko, made in Japan, dated 1977. 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 one 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 ). Stock # SKO61380011-3 Brand Seiko Style Chronograph Model 6138-0011 Serial 78XXXX Size Men's Material Stainless Steel Dial Black Millimeters 44 Bracelet Seiko Stainless Steel Bracelet 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 orignial tachymeter bezel displays honest signs of light signs of use and remain deep black in color. The case retians its original pushers, the crown may be an early service replacement. The case back retains all of the factory markings in visible condition though some fading is present from wear. The original Seiko bracelet is in excellent overall condition and retains 22 links that show almost no stretch and will fit up to a 7 1/2-inch wrist. DIAL & HANDS The original matte black dial is in very well-preserved condition, showing almost no signs of age and no damage whatsoever. The sub-dials remain in near perfect condition as well. The lume plots have taken on a dark grey coloration, under U.V. light inspection some nominal degradation is present in some of the plots though it is not detectable to the naked eye. The origina luminous hands match the dial perfectlywith no degradation present under U.V. light inspection. There is some chipping in the white enamel of the hands that is shown in the photos. ACCESSORIES None. Watch is functioning and keeping time, previous service history is unknown.

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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