Seiko Marinemaster 300M Green SBDX021

The Seiko Marinemaster 300M Green SBDX021 a  clean robust design that is made to function. Inside this limited of 1968 pieces is the 8L35 movement, which is an undecorated version of the Grand Seiko 9S55 movement. It is a 44mm steel case and that can scare many wrists but somehow Seiko made it wear like a 42mm with the monobloc steel case. Not to mention the green dial and bezel with gold accents was perfectly executed!

Information:

Reference: SBDX021

Limited: 1968 Made

Bezel Aligns

Dial: Green

Bracelet: Stainless Steel Bracelet and Unworn Black Rubber Strap

Case Size: 44mm x 15mm Thickness

Lug Width: 20mm

Case Metal: Stainless Steel

Movement: 8L35 - Automatic

Functions: Hours, Minutes, Second, Date

Box and Papers: Box and Papers

Crystal: Hardlex

Bracelet size: 7.75”

Condition: 

Case has little to no wear. Bracelet has light normal wear. Strap is unworn. Dial, hands, and crystal have no wear. Watch is running within spec.

History of Seiko Watches

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.