Seiko Chronograph "Baby Jumbo Speedy" 6139-7039 Black Dial in Steel Case on Steel Bracelet

Seiko

Seiko Chronograph "Baby Jumbo Speedy" 6139-7039 Black Dial in Steel Case on Steel Bracelet

$1,000

A rare and highly collectible variation of Seiko’s legendary automatic chronographs, the Seiko 6139-7039—known among collectors as the “Baby Jumbo Speedy”—offers the perfect balance between bold 1970s design and wearable proportions. The nickname reflects its visual connection to Seiko’s larger “Jumbo” chronographs, paired with a more compact, versatile case size. At the heart of the watch is Seiko’s historic Caliber 6139 automatic chronograph movement. Introduced in 1969, it was one of the world’s first automatic chronographs and remains celebrated for its advanced engineering, including a column wheel and vertical clutch. These features provide smooth chronograph engagement and exceptional durability—hallmarks of Seiko’s technical leadership during this era. The dial features a clean, high-contrast layout with a single-register 30-minute chronograph counter, applied hour markers, and bold hands designed for excellent legibility. A day-date display at 3 o’clock adds everyday practicality, while the tachymeter-style bezel reinforces the watch’s motorsport-inspired character. Housed in a stainless-steel case that wears comfortably on a wide range of wrists, the 6139-7039 delivers strong vintage presence without the oversized feel of some contemporaries. It’s a chronograph that feels purposeful, balanced, and unmistakably Seiko.

Brand: Seiko
Model: " Baby Jumbo Speedy"
Case: 39mm
Dial: Black
Crown: Steel crown
Crystal: Sapphire Crystal
Movement: Automatic movement
Strap: Steel Bracelet
Year: c. 1970s
Condition: Very Good

About the Brand

Founded in 1881 in Tokyo by Kintarō Hattori, Seiko began as a small watch and clock repair shop with a forward-looking philosophy: always one step ahead of the rest. That mindset led to the creation of Seikosha in 1892, meaning “House of Exquisite Workmanship,” and set the foundation for more than a century of horological innovation. In 1913, Seiko produced Japan’s first wristwatch, the Laurel, marking the country’s entry into modern watchmaking. The brand continued to redefine the industry in 1969 with the release of the Astron, the world’s first quartz wristwatch—an achievement that transformed global standards for accuracy, reliability, and accessibility. Seiko has also been a pioneer in mechanical watchmaking. In 1969, it introduced the Caliber 6139, one of the world’s first automatic chronograph movements, featuring a column wheel and vertical clutch—technical choices still regarded as benchmarks today. During the 1960s and 1970s, Seiko dive watches earned international recognition for their robustness, helping define modern professional dive watch standards. What truly sets Seiko apart is its complete in-house manufacturing. From movements and cases to dials, hands, and even lubricants, Seiko controls nearly every step of production. This rare vertical integration allows the brand to balance innovation with long-term reliability, whether in mechanical, quartz, or hybrid technologies. Trusted in space, competitive sports, and daily life, Seiko watches have accompanied astronauts, timed major international sporting events, and become lifelong companions for millions around the world. More than 140 years after its founding, Seiko continues to craft watches that blend technical excellence with understated design—timepieces built not for passing trends, but for moments that last.

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Seiko Chronograph "Baby Jumbo Speedy" 6139-7039 Black Dial in Steel Case on Steel Bracelet

$1,000

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