Update: 89ST Series Stopwatches - Olympic Sports Timers

Update: 89ST Series Stopwatches - Olympic Sports Timers

I have added some videos of the movements in operation to the main article on the 89ST series of stopwatches. I have also included a short slow motion section to make it easier to see the movements. You will note that the 890C when slowed down to 5% of normal speed is still at 18,000 bph, the same speed as the 890A operating normally.

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89ST Series Stopwatches - Olympic Sports Timers

89ST Series Stopwatches - Olympic Sports Timers

In the early 1960’s Seiko developed a series of high quality stopwatches specifically designed for the 1964 Tokyo Olympics. These models were sold to the public for over a decade and were used at two different Olympic Games. Two of these stopwatches have a split second complication while a third operates at a high frequency of 360,000 bph.

While the Seiko designer Taro Tanaka is know for his "Grammar of Design" this series of stopwatches shows the range of products he influenced during his career. These models were the most interesting mechanical sports timers developed by Seiko and there is a very interesting story behind their development and evolution.

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Seiko at the Neuchâtel Observatory Competitions - Quartz Entries

Seiko at the Neuchâtel Observatory Competitions - Quartz Entries

In the 1960’s Seiko participated in the Chronometer competitions that were held at the Neuchâtel Observatory in Switzerland. During these competitions Seiko participated in the mechanical wrist watch categories as well as various quartz categories. Their first entry was in 1963 where they placed 10th and by 1967 they dominated the pocket chronometer category with the first 5 places and 13 of the top 15 entries. This article focuses on the quartz entries from Suwa-Seikosha and their participation in the competitions.

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Update: 50th Anniversary of the first automatic chronograph - Seiko’s 6139

I have updated the article about the first release of the 6139 chronograph to include an article from the Suwa Seiko internal company newsletter. This article supports the May 1969 market introduction date of the models.

The revised article on the release of the Seiko 6139 chronographs can be found here:
50th Anniversary of the first automatic chronograph - Seiko’s 6139

Update: 50th Anniversary of the first automatic chronograph - Seiko’s 6139

Another example of a Seiko 6139-6010 chronograph with a January 1969 produced case has been discovered. This watch has the serial number of 910170 and is just 21 units from the only other known January 1969 example.

I have also just added a February 1969 produced 6139-6000 model to my collection. Now I need to track down a January example.

I have updated my previous article on the release of the Seiko 6139 chronographs and this can be found here:
50th Anniversary of the first automatic chronograph - Seiko’s 6139

50th Anniversary of the first automatic chronograph - Seiko’s 6139

50th Anniversary of the first automatic chronograph - Seiko’s 6139

This year represents the 50th Anniversary of the first automatic chronographs that were released by multiple companies in 1969. Seiko’s first automatic chronograph calibre was the 6139 and it was available in a number of models. There has been much debate over the years as to which companies products were “first” so I try to look at the evidence to determine when Seiko models were first produced and released to the market.

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Seiko Olympic Timing - 1972 Sapporo Games

Seiko Olympic Timing - 1972 Sapporo Games

Many people are aware of Seiko’s involvement win the 1964 Tokyo Olympic Games but their involvement in the 1972 Sapporo Winter Olympics is less commonly known. I recently acquired a Seiko promotional folder for the Sapporo ‘72 games and have documented its contents here as well as some other background information on the event and its preparation.

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