6138-0010 UFO March 1970
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- MODEL: 6138 JDM 'UFO/Yachtsman' Speed Timer 5 Sports Chronograph from March 1970
- REFERENCE: 6138-0010
- DIAL: Original Black JAPAN 6138 -0010T
- CASE MATERIAL: Stainless Steel
- CASE DIMENSIONS: 44x47x15mm Height,
- LUG WIDTH: 19mm
- CRYSTAL: Hardlex Mineral Crystal
- CASE BACK: Screw-in Stainless Steel
- MOVEMENT: Seiko Automatic Cal. 6138A, 21 Jewels
- Serial Number: 039521
- Service History: Serviced 2023, ±20s/day
- Bracelet: Original (from slightly later variant) Seiko 5 Sports with signed clasp will fit up to a 19.5cm wrist
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Vintage Seiko 6138-0010 from March 1970 - Japanese Domestic Market (JDM) variant.
One of the earliest releases in the 6138 lineup this variant is widely referred to as the 'UFO' perhaps due to its flying saucer case shape and floating look on the wrist with its hidden lugs. For unknown reasons Seiko itself referred to it as the 'Yachtsman' in marketing material, as presumably they saw sailors as a target market . Hands, dial and lume are all in great shape, the early two piece sweep hand, which often fade, retains its vibrant orange colour. Day/Date display at 3 o'clock with English/Kanji days with quickset working as it should. Interestingly the 6138 movement was actually the successor of the 6139 (now widely accepted as the first automatic chronograph brought to market in 1969) and watches featuring both movements were produced in parallel until circa 1978 when both were discontinued. A useful feature of the 6138 is that unlike their 6139 cousins they can be hand-wound.
All original except for crystal and comes on a XAA541 bracelet which is JDM but would have been from a slightly later variant, will fit up to a 19.5cm wrist. Serviced last year by @benchdweller.uk so running beautifully. The movement is clean, free of any deterioration and keeping great vintage time. Automatic chronograph with a thirty minute register at 6 o’clock and a 12 hour register at 12. Chronograph functions all working as they should, pushers click nice and firmly and sweep hand resets perfectly to 12. Cosmetically in excellent condition. Dial, hands and indices near perfect with original lume in good condition.
Movement: Original, SEIKO Suwa 21 J 6138A (21,600 beats per hour). Day/date turn over at midnight & quickset works as it should.
Pusher, crown and caseback gaskets replaced and lubricated at service but not guaranteed water resistant.
Dial: Black in excellent condition featuring Water 70 Proof below the day/date window.
Day/Date at 3 o'clock Day in English and Kanji, features the classic Sunday in red. Operated by turning the crown in position 2
Glass: Unmarked, replaced (original available on request)
Case: Original, unpolished stainless steel, minor age related wear. Caseback is in great shape with serial number and reference numbers still clearly legible
Crown: Original, well fitted
A word of caution: I strongly advise you to do plenty of research before committing your hard earned money to buying a 6138 or any other vintage Seiko for that matter. It may come as a surprise considering Seiko are not considered 'high end' that many parts on watches you will see for sale are aftermarket (in other words fake) and many pieces are what's known in the trade as 'Frankens' - watches cobbled together from various sources and probably also sporting lots of fake parts too - It used to be quite easy to spot these watches but fake parts are getting harder and harder to tell from the real thing, so please be very wary. Something I would also advise is to 'buy the seller' and hopefully as you are here it means you're considering doing just that. I have spent many years building my reputation and doing the research so you don't have to. Feel free to contact me with questions and I am always more than happy to provide referrals.
One of the earliest releases in the 6138 lineup this variant is widely referred to as the 'UFO' perhaps due to its flying saucer case shape and floating look on the wrist with its hidden lugs. For unknown reasons Seiko itself referred to it as the 'Yachtsman' in marketing material, as presumably they saw sailors as a target market . Hands, dial and lume are all in great shape, the early two piece sweep hand, which often fade, retains its vibrant orange colour. Day/Date display at 3 o'clock with English/Kanji days with quickset working as it should. Interestingly the 6138 movement was actually the successor of the 6139 (now widely accepted as the first automatic chronograph brought to market in 1969) and watches featuring both movements were produced in parallel until circa 1978 when both were discontinued. A useful feature of the 6138 is that unlike their 6139 cousins they can be hand-wound.
All original except for crystal and comes on a XAA541 bracelet which is JDM but would have been from a slightly later variant, will fit up to a 19.5cm wrist. Serviced last year by @benchdweller.uk so running beautifully. The movement is clean, free of any deterioration and keeping great vintage time. Automatic chronograph with a thirty minute register at 6 o’clock and a 12 hour register at 12. Chronograph functions all working as they should, pushers click nice and firmly and sweep hand resets perfectly to 12. Cosmetically in excellent condition. Dial, hands and indices near perfect with original lume in good condition.
Movement: Original, SEIKO Suwa 21 J 6138A (21,600 beats per hour). Day/date turn over at midnight & quickset works as it should.
Pusher, crown and caseback gaskets replaced and lubricated at service but not guaranteed water resistant.
Dial: Black in excellent condition featuring Water 70 Proof below the day/date window.
Day/Date at 3 o'clock Day in English and Kanji, features the classic Sunday in red. Operated by turning the crown in position 2
Glass: Unmarked, replaced (original available on request)
Case: Original, unpolished stainless steel, minor age related wear. Caseback is in great shape with serial number and reference numbers still clearly legible
Crown: Original, well fitted
A word of caution: I strongly advise you to do plenty of research before committing your hard earned money to buying a 6138 or any other vintage Seiko for that matter. It may come as a surprise considering Seiko are not considered 'high end' that many parts on watches you will see for sale are aftermarket (in other words fake) and many pieces are what's known in the trade as 'Frankens' - watches cobbled together from various sources and probably also sporting lots of fake parts too - It used to be quite easy to spot these watches but fake parts are getting harder and harder to tell from the real thing, so please be very wary. Something I would also advise is to 'buy the seller' and hopefully as you are here it means you're considering doing just that. I have spent many years building my reputation and doing the research so you don't have to. Feel free to contact me with questions and I am always more than happy to provide referrals.
