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CITIZEN “MONACO” flyback chronograph, N.O.S. (New Old Stock)
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Brand | Citizen |
---|---|
Model | |
Gender | Man |
Decade | 1970s |
Serial number | 40201633 |
Case code | 4-901061-K |
Movement | Automatic |
Caliber | 8110 A |
Crystal | Original Plexiglass, flawless |
Dial | Golden with two sub-spheres and calendar at 3 o'clock. |
Corona | Origin crown and pushers |
Case material | Steel |
Diameter without crown | 37 mm |
Diameter with crown | 38.5 mm |
Lug-to-lug length | 42 mm |
Thickness | 11,5 mm |
Strap width | 18 mm |
Strap material | Stainless steel |
Strap color | Steel |
Closure/buckle | Original firmado Citizen, steel. |
Condition of the watch | N.O.S. (New Old Stock) |
Case/Box | Yes, generic. |
Documentation | Free Certificate of Authenticity available on request |
The history of Citizen began in 1918 in Tokyo, Japan, when the Shokosha Institute of Watch Research was founded. In its early days, the company was primarily focused on manufacturing components for pocket watches. In 1924, Citizen released its first pocket watch, marking the brand’s debut in the watch market. The name Citizen was chosen in 1930, inspired by the idea of creating affordable, high-quality watches that could be worn by “everyone in the world.”
Expansion and innovation in quartz technology
In the 1960s and 1970s, Citizen became one of the leading manufacturers of quartz watches, introducing innovative and precise models that quickly gained popularity both in Japan and overseas. One of their major successes was the Citizen Crystron Solar Cell in 1976, the first solar-powered quartz watch, which represented a milestone in sustainable watchmaking technology. This innovation paved the way for the famous Eco-Drive watch line, which is still a prominent feature.
Eco-Drive technology and sustainability
Citizen introduced its Eco-Drive technology in 1995, revolutionizing the market with watches that operate thanks to an integrated solar cell that can recharge the battery with any source of light, both natural and artificial. This technology eliminates the need for battery replacements, making Eco-Drive an eco-friendly and practical choice. The Eco-Drive line is one of Citizen’s most recognized and has strengthened the brand’s image as a pioneer in sustainable technology.
Innovation in durability and functionality
Citizen also excelled in creating highly durable and precise watches. In 1982, they introduced the Citizen Professional Diver, a dive watch with a water resistance of 1300 meters, specially designed for professional divers. Additionally, Citizen was a trailblazer in integrating radio and GPS synchronization technology, allowing some of their watches to automatically adjust the time based on location, ensuring absolute precision regardless of the time zone.
Citizen today
Today, Citizen is one of the largest watch brands globally and operates in over 130 countries. The company has maintained its commitment to innovation and the development of technologies that prioritize precision, sustainability, and functionality. In addition to the Eco-Drive line, Citizen offers a wide range of watches, from elegant models to sports and high-resistance watches, such as the Promaster series.
Citizen represents a blend of tradition and advanced technology, staying true to its original mission of creating affordable, high-quality watches for “everyone.” This philosophy has made Citizen one of the most recognized and trusted brands in the global watch industry.
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CITIZEN BULLHEAD CHRONOGRAPH, AUTOMATIC 1970s
INFORMACIÓN
Brand | Citizen |
---|---|
Model | Chronograph Bullhead |
Gender | Man |
Country of origin | Japan |
Decade | 1970s |
Year of manufacture | 1972 |
Movement | Automatic |
Crystal | Mineral |
Dial | White, with three subdials and tachymeter. |
Corona | Steel, signed CITIZEN |
Case material | Stainless steel |
Diameter without crown | 36 mm |
Diameter with crown | 37 mm |
Lug-to-lug length | 36.4 mm |
Thickness | 12 mm |
Strap width | 20 mm |
Strap material | Stainless steel |
Strap color | Steel |
Closure/buckle | Steel, CITIZEN signed clasp. |
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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CITIZEN BULLHEAD, VINTAGE 1970s, AUTOMATIC
INFORMACIÓN
Brand | Citizen |
---|---|
Model | Chronograph Bullhead |
Gender | Man |
Decade | 1970s |
Year of manufacture | 1974 |
Serial number | 70305882 |
Case code | 4-901134 K |
Movement | Automatic |
Caliber | 8110A (23 rubies) |
Crystal | Mineral |
Dial | Golden with three subdials and double date display at 6 o'clock. |
Case material | Steel |
Diameter without crown | 36 mm |
Diameter with crown | 37 mm |
Lug-to-lug length | 36.4 mm |
Thickness | 12 mm |
Strap width | Strap width: 36 mm |
Strap material | Cowhide leather, custom handmade |
Strap color | Brown |
Closure/buckle | Steel |
Condition of the watch | Very good, with slight signs of aging. |
Case/Box | Yes, generic. |
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CITIZEN CHRONO FLYBACK 67/9631, AUTOMATIC
INFORMACIÓN
Brand | Citizen |
---|---|
Model | Crono Flyback 67/9631 |
Gender | Man |
Decade | 1970s |
Serial number | 31121302 |
Case code | 4-900049 Y |
Movement | Automatic |
Caliber | 8100A (23 rubíes) |
Crystal | Mineral |
Dial | Light blue with double date display at 3 o'clock. |
Corona | Original, signed Citizen |
Case material | Steel |
Diameter without crown | 38 mm |
Diameter with crown | 39.5 mm |
Lug-to-lug length | 41 mm |
Thickness | 12 mm |
Strap width | 20 mm |
Strap material | Stainless steel |
Strap color | Steel |
Closure/buckle | Stainless steel |
Condition of the watch | Excellent, like new! |
Case/Box | Yes, generic. |
Documentation | Free Certificate of Authenticity available on request |

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CITIZEN BULLHEAD, AUTOMATIC, VINTAGE 70s
INFORMACIÓN
Brand | Citizen |
---|---|
Model | Chronograph Bullhead |
Gender | Man |
Decade | 1970s |
Year of manufacture | 1975 |
Movement | Automatic |
Crystal | The crystal |
Dial | Golden, flawless |
Bezel | Bezel |
Corona | Original, signed Citizen |
Case material | Steel |
Diameter without crown | 36 mm |
Diameter with crown | 37 mm |
Lug-to-lug length | 36.4 mm |
Thickness | 12 mm |
Strap width | Strap width: 36 mm |
Strap material | Cowhide leather, custom handmade |
Strap color | Brown |
Closure/buckle | Closure/buckle |
Condition of the watch | Excellent, like new! |
Case/Box | Yes, your original. |
Documentation | Yes |

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OMEGA DYNAMIC, VINTAGE YEAR 1970, AUTOMATIC
INFORMACIÓN
Brand | Omega |
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Model | Dynamic |
Gender | Man |
Decade | 1970s |
Year of manufacture | 1970 |
Case code | 107 |
Movement | Automatic |
Crystal | Plexiglass |
Dial | Bicolor gold and bronze colors (rarity) |
Corona | Original, signed Omega |
Case material | Gold-plated steel, 20 microns. |
Diameter without crown | 41 mm |
Diameter with crown | 42 mm |
Lug-to-lug length | 36 mm |
Thickness | 10 mm |
Strap width | 22 mm |
Strap material | First quality cowhide. |
Strap color | Black |
Closure/buckle | Ace watch, gold-plated with original Omega seal |
Condition of the watch | Excellent, like new! |
Case/Box | Yes, generic. |
Documentation | Free Certificate of Authenticity available on request |

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OMEGA CALIBER 30T2, VINTAGE YEAR 1939
INFORMACIÓN
Brand | Omega |
---|---|
Model | Classic 30T2 |
Gender | Man |
Decade | 1930s |
Year of manufacture | 1939 |
Serial number | 9454590 |
Case code | 1037B756 |
Movement | Manual winding |
Caliber | Omega 30T2 |
Crystal | Plexiglass |
Dial | Beige with Arabic numerals, patinated |
Corona | Original, signed Omega |
Case material | Steel |
Diameter without crown | 36 mm |
Diameter with crown | 37.5 mm |
Lug-to-lug length | 41 mm |
Thickness | 9 mm |
Strap width | 18 mm |
Strap material | Cowhide |
Strap color | Black |
Closure/buckle | Steel |
Condition of the watch | Well, with logical signs of the passage of time. |
Case/Box | Yes, generic. |
Documentation | Free Certificate of Authenticity available on request |

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OMEGA GENÉVE 1970 MANUAL
INFORMACIÓN
Brand | Omega |
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Model | Geneva |
Gender | Man |
Decade | 1970s |
Year of manufacture | 1970 |
Case code | 131.019 SP |
Movement | Manual winding |
Caliber | Omega 601 |
Crystal | Plexiglass |
Dial | Golden with Arabic numerals |
Corona | Original, signed Omega |
Case material | Stainless steel |
Diameter without crown | 34 mm |
Diameter with crown | 36 mm |
Lug-to-lug length | 40 mm |
Thickness | 9 mm |
Strap width | 18 mm |
Strap material | Lizard skin |
Strap color | Bordeaux |
Closure/buckle | Steel |
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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DUWARD VINTAGE AUTOMATIC, 50s
INFORMACIÓN
Brand | Duward |
---|---|
Model | Diplomático |
Gender | Man |
Decade | 1950s |
Serial number | 3609121 |
Case code | 25022 divided by 4 |
Movement | Automatic |
Caliber | 2452 |
Crystal | Origin plexiglass |
Dial | Champagne color with a date display at 3 o'clock. |
Case material | Gold-plated with 10 microns |
Diameter without crown | 33 mm |
Diameter with crown | 35 mm |
Lug-to-lug length | 40 mm |
Thickness | 10 mm |
Strap width | 18 mm |
Strap material | Cowhide |
Strap color | Black |
Closure/buckle | Type squirrel |
Condition of the watch | Well, with logical signs of the passage of time. |
Case/Box | Yes, generic. |
Documentation | Free Certificate of Authenticity available on request |
