In 1978, Seiko introduced the first 150 m diver’s watch with quartz movement in history, the 7548 Slim Turtle, alongside the 600 m and 300 m quartz divers launched the same year. In this guide, we will examine all the known variants of the 7548 divers, produced until the mid-1980s. Index The origins of the Seiko Slim Turtle The first Slim Turtle series, based on the quartz caliber 7548, was …
Seiko Transocean watches were introduced to the market in January 2016, presented as watches with a sporty-elegant design suitable for every situation, including city life and office work, but with all the features of professional divers. The careful design is complemented by high-quality materials: a bezel entirely made of ceramic, sapphire with anti-reflective coating on the inner surface, steel (titanium for the Spring Drive models) with Diashield treatment. Seiko Transocean …
The world’s first diver watch featuring a Hi-Beat movement, the first to sport a titanium case, and the first equipped with a quartz movement: these are just a few of the numerous pioneering achievements by Seiko, accomplished over decades of research and development in the field of underwater timepieces. In this guide, you will discover the diver watch models arranged in chronological order, with a focus on those of the …
In the early 1950s, Seiko gradually introduced 5-digit case codes, sometimes preceded by the letter ‘J’. This coding system remained the standard for Seiko watches until 1964, covering a period of just over a decade. The first two digits of the code approximately indicate the dial size, expressed in lignes. When the first two digits are preceded by the letter ‘J’, it means that half a ligne should be added …
The Seiko SKZ line is a series of entry-level automatic watches housing the 7S36 movement. This series includes a huge variety of Seiko 5 Sports, such as the Seiko Atlas and the Frankenmonsters, and collectible dive watches such as many limited editions of the first generation Monsters. The 7S36 automatic movement shares all of the same characteristics as the 7S26, but with the addition of 2 jewels, for a total …
The Seiko SNX line is a series of entry-level automatic watches housing the 7S26 movement, similarly to the SNK series. Many watches in this line were well known for their affordability, reliability and excellent value for money. Being based on the same automatic movement 7S26, they all have 21 jewels and run at 21,600 bph with 41 hours of power reserve. Both hand-winding and stop seconds hand functions are not …
The Seiko SNK line is a series of entry-level automatic watches housing the 7S26 movement. Many watches in this line were well known for their affordability, reliability and excellent value for money. Being based on the same automatic movement 7S26, they all have 21 jewels and run at 21,600 bph with 41 hours of power reserve. Both hand-winding and stop seconds hand functions are not present. SNK series watches
The Seiko SKX series, known above all for some entry-level diver’s such as the SKX007 and SKX009, is a series based on the 7S26 automatic caliber that counts hundreds of references from the Seiko 5 family. The following list includes all known SKX references, with various information on each model. If you are solely interested in diver’s and sports watches from the series, I recommend this article on Seiko SKX …
In the spring of 1969 Seiko introduced the 5 Sports Speed Timer to the Japanese domestic market. It was the world’s first self-winding chronograph. The revolutionary 6139A automatic movement featured a vertical clutch system and a column wheel. A few years later, in November 1973, the Seiko Speed Timer also became the first automatic chronograph to travel into space, worn by Colonel William Reid Pogue during the NASA Skylab 4 …
When we talk about Grand Seiko quartz watches, and in particular the current 9F series, we are referring to high quality and precision calibers, assembled by hand by expert craftsmen, and produced entirely in-house (including quartz crystals). The first Grand Seiko-branded quartz watches in history entered the scene in 1988, nearly 20 years after the world’s first quartz wristwatch: the Seiko Quartz-Astron 35SQ. From the development of the first quartz, …