Seiko Diver SKX007 "7S26-0020"

The Seiko SKX007 Diver Ref. 7S26-0020 is one of the most recognizable and beloved affordable mechanical dive watches ever produced, earning a devoted following among collectors and enthusiasts around the world. Introduced in 1996 as the successor to Seiko's 7002 series, the SKX007 carries forward the brand's professional diving heritage that began with the legendary 62MAS in 1965. Its 42.5mm stainless steel case features a distinctive rounded profile, short lugs, and a recessed screw-down crown positioned at 4 o'clock, giving the watch excellent wearability despite its substantial dimensions. The matte black dial features oversized luminous hour markers, bold hands, and a practical day-date display at 3 o'clock, while the matching black aluminum unidirectional rotating bezel provides a classic 60-minute diving scale. Seiko's proprietary Hardlex crystal, screw-down caseback, and ISO 6425-compliant 200 meters of water resistance reinforce its reputation as a genuine diving instrument rather than simply a dive-inspired sports watch.

Inside is Seiko's automatic Calibre 7S26, a robust 21-jewel mechanical movement operating at 21,600 vibrations per hour and delivering approximately 41 hours of power reserve. Designed with durability and simplicity in mind, the 7S26 utilizes Seiko's efficient Magic Lever automatic winding system and is powered entirely by wrist movement, without manual winding or hacking seconds functionality. The SKX007 remained in production for more than two decades before being discontinued around 2019, an unusually long production run that speaks to the enduring appeal of its design. During that time, it became a favorite among professional divers, everyday watch enthusiasts, and collectors looking for an accessible introduction to mechanical watchmaking. With its iconic black dial and bezel combination, dependable automatic movement, true professional diving specifications, and now-discontinued status, the SKX007 has become a modern Seiko classic and one of the defining tool watches of its generation.

Reference: SKX007 "7S26-0020"

Date: 2020

Bracelet: Stainless Steel Bracelet

Case Size: 42.5mm x 45.5mm lug to lug

Lug Width: 20mm

Case Metal: Stainless Steel

Movement: 7S26 - Automatic

Functions: Hours, Minutes, Seconds, Date-Day

Box and Papers: Box and papers

Crystal: Hardlex

Bracelet size: 7.5”

Case has no wear. Bracelet has no wear. Runs within spec.

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.