1969 Seiko 'Slim Turtle' 6105-8000

The 1969 Seiko 6105-8000 “Slim Turtle” marks the beginning of one of Seiko’s most iconic dive watch lineages. Known for its slimmer case profile and elegant cushion shape, this early variant showcases the design DNA that would later evolve into the legendary 6105-8110/8119 worn in Apocalypse Now. Its matte black dial, applied markers, and original-style hands deliver that unmistakable late-’60s Seiko tool-watch charm, while the bidirectional bezel and recessed crown reflect the brand’s purposeful, function-first engineering.

This example has been recently serviced, ensuring that the robust caliber 6105A is running strong and ready for dependable wear. With correct period aesthetics, clean lines, and the comfortable wrist feel that earned it the “Slim Turtle” nickname, it stands as a highly collectible yet approachable vintage diver. Whether you’re building out a serious Seiko collection or looking for a historically significant daily-wear piece, this 6105-8000 offers the ideal mix of originality, reliability, and true vintage presence

Reference: 6105-8000

Year: 1969

Serial: 924XXX

Bracelet: Black rubber strap

Case Size: 41mm x 14mm Thickness

Lug Width: 19mm

Case Metal: Stainless Steel

Dial: Black 'Proof' Dial

Movement: 6105A - Automatic - Serviced December 2025

Functions: Hours, Minutes, Seconds, Date

Box and Papers: No box or papers - watch only

Crystal: Plexiglass

Bracelet size: 7.5”

Case has light wear with some marks. Strap has minimal wear. Dial and hands have minimal wear. Crystal is free of wear. Serviced 12/10/2025.

Seiko's history began in 1881 when Kintaro Hattori opened a watch shop in Tokyo. In 1892, he established Seikosha, a factory for producing wall clocks. The company quickly progressed, creating Japan's first wristwatch, the Laurel, in 1913. Despite setbacks like the Great Kanto Earthquake of 1923, Seiko persevered, launching its first watch under the Seiko brand name in 1924.

The post-World War II era saw Seiko's rapid growth and innovation. They introduced Japan's first automatic wristwatch in 1956 and launched the prestigious Grand Seiko line in 1960. Seiko achieved international recognition for accuracy in 1968, winning a Geneva Observatory competition. 

The company made a name for its divers in 1965 with the introduction of their first professional dive watch, the 62MAS. This was followed by the iconic 6159-7001 in 1968, which was water-resistant to 300 meters. Seiko gained international recognition in 1975 with the release of the 6159-7010, nicknamed the "Tuna Can" due to its distinctive case shape. In 1969, they revolutionized the industry with the Astron, the world's first quartz wristwatch, ushering a new era of watchmaking that would send waves across the industry through the 70s and 80s. From its humble beginnings to becoming a global watchmaking giant, Seiko's history is characterized by resilience, technological advancement, and a commitment to precision.