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SEIKO BULLHEAD 6138-0040, AUTOMATIC, YEAR 1976
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| Brand | Seiko |
|---|---|
| Model | 6138-0040 Bullhead |
| Gender | Man |
| Decade | 1970s |
| Year of manufacture | 1976 |
| Serial number | 6D9402 |
| Case code | 0040 |
| Movement | Automatic |
| Caliber | Seiko 6138 |
| Crystal | Hardlex Seiko |
| Bezel | Aluminum, with tachymeter. |
| Case material | Steel |
| Diameter without crown | 43 mm |
| Diameter with crown | 44 mm |
| Lug-to-lug length | 47 mm |
| Thickness | 14 mm |
| Strap width | 20 mm |
| Strap material | Steel |
| Strap color | Steel |
| Closure/buckle | Drop-down clasp, signed SEIKO |
| Condition of the watch | Very good, with slight signs of aging. |
| Case/Box | Yes, generic. |
| Documentation | Free Certificate of Authenticity available on request |
Seiko’s history began in 1881 in Tokyo, Japan, when a young entrepreneur named Kintaro Hattori opened a watch repair and sales shop. His vision was to create high-quality watches, and in 1892 he founded the Seikosha factory (in Japanese, “Seiko” means “precision” or “success”, and “sha” means “house”). Initially, Seikosha produced wall clocks, but over time they focused on pocket and wristwatches production.
First Japanese wristwatch
In 1913, Seikosha launched the Laurel, the first wristwatch made in Japan. This marked a significant milestone, as Japan had no watchmaking tradition at that time. The company became a pioneer in its country and laid the foundation for what would become a benchmark name in the global watch industry.
Technological innovation and quartz watches
In 1969, Seiko revolutionized the watchmaking world with the Seiko Astron, the world’s first quartz wristwatch. This breakthrough transformed the watch industry by introducing a much more accurate and affordable technology than traditional mechanical movements. Quartz technology quickly became popular and remains a standard in modern watchmaking.
Precision and reliability
Over time, Seiko has introduced multiple watchmaking innovations, such as the automatic chronograph and the Kinetic charging system (a combination of kinetic energy and quartz technology). It is also known for its dive watches, highly valued for their durability and resistance in extreme conditions.
Seiko has earned a special place in the watch industry by combining tradition and technology at affordable prices, offering from simple models to high-end pieces with its Grand Seiko line.
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Additional information
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- Unique piece
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SEIKO UFO 6138-0012, AUTOMATIC CHRONOGRAPH, 1977
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Model | UFO 6138-0012 |
| Gender | Man |
| Country of origin | Japan |
| Decade | 1970s |
| Year of manufacture | 1977 |
| Serial number | 7N4078 |
| Case code | Attribute 0012 |
| Movement | Automatic |
| Caliber | Seiko 4R36 |
| Crystal | Original PLexiglás |
| Dial | Black, with two subdials and calendar at 3. |
| Bezel | Aluminum, with tachymeter. |
| Corona | Steel, original Seiko. |
| Case material | Stainless steel |
| Diameter without crown | 43.5 mm |
| Diameter with crown | 45 mm |
| Lug-to-lug length | 46 mm |
| Thickness | 13 mm |
| Strap width | 19 mm |
| Strap material | Stainless steel |
| Strap color | Steel |
| Closure/buckle | Steel, SEIKO signed clasp type |
| Condition of the watch | Very good, with slight signs of aging. |
| Case/Box | Yes, generic. |
| Documentation | Free Certificate of Authenticity available on request |
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SEIKO BELL-MATIC 4006-6060, AUTOMATIC, VINTAGE YEAR 1975
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Model | BELL-MATIC 4006-6060 |
| Gender | Man |
| Country of origin | Japan |
| Decade | 1970s |
| Year of manufacture | 1975 |
| Serial number | 560136: Rose gold color, stainless steel. |
| Case code | 6060 |
| Movement | Automatic |
| Crystal | Original PLexiglás |
| Dial | White, with calendar at 3 |
| Bezel | Interior, bidirectional rotating |
| Corona | Steel, original SEIKO + alarm stop button at 2 o'clock |
| Case material | Stainless steel |
| Diameter without crown | 39 mm |
| Diameter with crown | 40.7 mm |
| Lug-to-lug length | 44.4 mm |
| Thickness | 12 mm |
| Strap width | 18 mm |
| Strap material | Stainless steel |
| Strap color | Steel |
| Closure/buckle | Steel, SEIKO signed clasp type |
| Condition of the watch | Excellent, like new! |
| Case/Box | Yes, generic. |
| Documentation | Free Certificate of Authenticity available on request |
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SEIKO QUARTZ “WORLD TIMER CHRONOGRAPF” SQ 100
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Model | WORLD TIMER CHRONOGRAPF SQ 100 |
| Gender | Man |
| Country of origin | Japan |
| Decade | 1990s |
| Year of manufacture | 1992 |
| Serial number | 200620 |
| Movement | Quartz |
| Crystal | Mineral |
| Dial | White with golden subdials, date display at 3 o'clock. |
| Bezel | World, 20-micron gold-plated |
| Corona | Original, firmada Seiko |
| Case material | Stainless steel |
| Diameter without crown | 40.5 mm |
| Diameter with crown | 42 mm |
| Lug-to-lug length | 44 mm |
| Thickness | 9 mm |
| Strap width | 20 mm |
| Strap material | Steel and gold-plated steel 20-micron coating |
| Strap color | Steel and Gold |
| Closure/buckle | Clasp type, original Seiko |
| Condition of the watch | Excellent, like new! |
| Case/Box | Yes, generic. |
| Documentation | Free Certificate of Authenticity available on request |
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SEIKO 5, 6119-8450 AUTOMATIC, VINTAGE YEAR 1971
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Model | 6119-8450 |
| Gender | Man |
| Decade | 1970s |
| Year of manufacture | 1971 |
| Serial number | 1D5120: Blue dial |
| Case code | 8450 |
| Movement | Automatic |
| Caliber | Seiko 6119 |
| Crystal | Original PLexiglás |
| Dial | Blue bicolor with double date display at 3 o'clock. |
| Corona | Original Seiko, de acero |
| Case material | Stainless steel |
| Diameter without crown | 40 mm |
| Diameter with crown | 40 mm |
| Lug-to-lug length | 44 mm |
| Thickness | 12 mm |
| Strap width | 18 mm |
| Strap material | Stainless steel |
| Strap color | Steel |
| Closure/buckle | Pin type, original signed Seiko |
| Condition of the watch | Very good, with slight signs of aging. |
| Case/Box | Yes, your original. |
| Documentation | Free Certificate of Authenticity available on request |
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SEIKO HELMET 6139-7101, AUTOMATIC CHRONOGRAPH
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Model | Helmet 6139-7101 |
| Gender | Man |
| Decade | 1970s |
| Year of manufacture | 1975 |
| Serial number | 541228: Golden Rose Gold Mesh Watch |
| Case code | 7101 |
| Movement | Automatic |
| Caliber | Seiko 6139 |
| Crystal | Plexiglass, impeccable |
| Dial | Black with double date display at 3 o'clock. |
| Bezel | Interior con taquímetro |
| Corona | Seiko Corona |
| Case material | Stainless steel |
| Diameter without crown | 40,2 mm |
| Diameter with crown | 40.2 mm |
| Lug-to-lug length | 48 mm |
| Thickness | 12.2 mm |
| Strap width | 20 mm |
| Strap material | Stainless steel |
| Strap color | Steel |
| Closure/buckle | Steel, original SEIKO. |
| Condition of the watch | Very good, with slight signs of aging. |
| Case/Box | Yes, your original. |
| Documentation | Free Certificate of Authenticity available on request |
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SEIKO 5 SPORTS SPEED TIMER KAKUME, VINTAGE YEAR 1974
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Gender | Man |
| Decade | 1970s |
| Year of manufacture | 1974 |
| Serial number | 441649 |
| Movement | Automatic |
| Crystal | Impeccable |
| Dial | Blue with two sub-dials, calendar at 3 o'clock. |
| Bezel | Aluminum, with tachymeter |
| Corona | Yours original. |
| Case material | Stainless steel |
| Diameter without crown | 43 mm |
| Diameter with crown | 45 mm |
| Lug-to-lug length | 45 mm |
| Thickness | 12 mm |
| Strap width | 20 mm |
| Strap material | Stainless steel |
| Strap color | Steel |
| Closure/buckle | Clasp type, original Seiko |
| Condition of the watch | Very good, with slight signs of aging. |
| Case/Box | Yes, generic. |
| Documentation | Free Certificate of Authenticity available on request |
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SEIKO CHRONOGRAPF KAKUME, VINTAGE AUTOMATIC
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Gender | Man |
| Decade | 1970s |
| Year of manufacture | 1973 |
| Movement | Automatic |
| Crystal | Impeccable |
| Dial | Bitono, blue and white |
| Bezel | Steel |
| Corona | Seiko Corona |
| Case material | Steel |
| Diameter without crown | 43 mm |
| Diameter with crown | 45 mm |
| Lug-to-lug length | 45 mm |
| Thickness | 12 mm |
| Strap width | 20 mm |
| Strap material | Steel |
| Strap color | Steel |
| Closure/buckle | Clasp type, original Seiko |
| Condition of the watch | Very good, with slight signs of aging. |
| Case/Box | Yes, your original. |
| Documentation | Yes |
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SEIKO 7006-7002 AUTOMATIC, VINTAGE YEAR 1971
INFORMACIÓN
| Brand | Seiko |
|---|---|
| Model | 7006-7002 Automatic |
| Gender | Man |
| Decade | 1970s |
| Year of manufacture | 1971 |
| Serial number | 152818 |
| Case code | 7006-7002 |
| Movement | Automatic |
| Caliber | Seiko 7006A |
| Crystal | Original PLexiglás |
| Dial | Silver, flawless |
| Bezel | Stainless steel |
| Corona | Yours original |
| Case material | Stainless steel |
| Diameter without crown | 39.1 mm |
| Diameter with crown | 40 mm |
| Lug-to-lug length | 41 mm |
| Thickness | 10.5 mm |
| Strap width | 18 mm |
| Strap material | Stainless steel |
| Strap color | Steel |
| Closure/buckle | Stainless steel, original Seiko. |
| Condition of the watch | Very good, with slight signs of aging. |
| Case/Box | Yes, generic. |
| Documentation | Free Certificate of Authenticity available on request |



