The tentagraph is possibly my favorite Grand Seiko to date. I love the detail and craftsmanship in other GS models, but the subtle color transition makes this one a stunner.
Mike Bertelson
31. March 2023 13:47
The Tentagraph was not Seiko’s first mechanical chronograph. I believe that was the Speed Timer in 1969. The Speed Timer was powered by the 6139 automatic chronograph movement. AAMOF, Seiko was one of a few watchmakers in a race to develop the world’s first automatic chronograph. Depending on who you ask, the Seiko 6139 was the first automatic chronograph to be released although many believe the Zeinth El Primero was first…then again Heuer believes they were first with their version of the Chronomatic.
Not only did Seiko release an automatic chronograph over 50 years ago but the Speed Timer was among the first automatic chronographs to hit the market. With a potential release to the Japanese market in May of ’69 and case back dates of as early as March of ’69, some have argued the 6139 based Speed Timer was first to hit the retail market.
Saviour Gauci
31. March 2023 8:02
Is it really all mechanical?
Mark
31. March 2023 1:16
Looking forward seeing the new version of the SBGA231. As if that beauty wasn’t good enough!
Comments
The tentagraph is possibly my favorite Grand Seiko to date. I love the detail and craftsmanship in other GS models, but the subtle color transition makes this one a stunner.
The Tentagraph was not Seiko’s first mechanical chronograph. I believe that was the Speed Timer in 1969. The Speed Timer was powered by the 6139 automatic chronograph movement. AAMOF, Seiko was one of a few watchmakers in a race to develop the world’s first automatic chronograph. Depending on who you ask, the Seiko 6139 was the first automatic chronograph to be released although many believe the Zeinth El Primero was first…then again Heuer believes they were first with their version of the Chronomatic.
Not only did Seiko release an automatic chronograph over 50 years ago but the Speed Timer was among the first automatic chronographs to hit the market. With a potential release to the Japanese market in May of ’69 and case back dates of as early as March of ’69, some have argued the 6139 based Speed Timer was first to hit the retail market.
Is it really all mechanical?
Looking forward seeing the new version of the SBGA231. As if that beauty wasn’t good enough!