Grand Seiko SBGT241 & SBGV238: 25 years of the quartz Caliber 9F

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In 1988, Japanese manufacturer Seiko came up with an idea that would position Grand Seiko miles ahead of every other quartz timepiece. The brand’s goal was to create the “ideal” quartz watch, with a caliber that would be more precise and durable than anything on the market back then. At that time, the advancements in quartz technology were mostly about adding new functions and features. Seiko rejected that approach and instead focused on the essentials, precision and durability, in line with the ideas that had always guided Grand Seiko. Finally, in 1993, the company introduced the Caliber 9F83, the first 9F caliber. The quartz movement featured several key innovations such as the instantaneous calendar change, a backlash auto-adjust mechanism, a twin pulse control system for increased torque, and an ingenious protective shield to protect it from dust.

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The original 1993 Caliber 9F83 watch


To celebrate the 25 years of this iconic quartz movement, Seiko created two Caliber 9F 25th Anniversary Limited Editions: the Grand Seiko SBGT241 &  the Grand Seiko SBGV238. For each of the two models, Seiko created a new white dial with a special pattern inspired by the traditional Quartz symbol. The dial pattern is slightly different at 5 o’clock and features discreetly displayed symbols 9F and 25. The Grand Seiko name is at 12 o’clock, while at 6 there is a gold 5-pointed star which symbolizes the movement’s extraordinary precision of ±5 seconds a year (at temperatures between 5°C and 35°C). To put this in perspective, an average mechanical watch has a precision rate of ±5 seconds a day while most standard quartz watches are accurate to ±15 seconds a month.

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Each dial features a special monogrammed pattern based on the characters “GS9F”


The Grand Seiko SBGT241 is a recreation of the original 1993 Caliber 9F83 watch. Housed in a Zaratsu-polished stainless steel case, the timepiece is water resistant to 100 meters and measures 39.1mm in diameter. On the back of the watch there is a closed stainless steel case back decorated with the Grand Seiko lion emblem in 18K gold. Inside this model is the iconic Caliber 9F83 which powers the hour, minutes, seconds and day and date functions. The latter two are displayed in a double window at 3 o’clock. The timepiece is presented on a sporty stainless steel bracelet. Limited to 1,500 pieces, the new Grand Seiko SBGT241 will be available in selected markets from April 2018 at a price of around €3,400.

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The Grand Seiko SBGT241 pays homage to the original 1993 Caliber 9F83 watch


The second Caliber 9F 25th Anniversary Limited Edition is the Grand Seiko SBGV238. This model is 40mm wide and has stainless steel case that is water resistant to 100 meters. Unlike on the SBGT241 model ,the bezel, hour markers and hands here are in gold. Another difference between the two watches is the caseback. The Grand Seiko SBGV238 features a sapphire caseback. According to Seiko, the case itself is a modern re-interpretation of the acclaimed 44GS from 1967. Powering this watch is the Caliber 9F82 displaying hours, minutes, seconds and date (3 o’clock). This model also comes on a steel bracelet. Priced at €5,000, the new the Grand Seiko SBGV238 is issued as a limited edition of 600 pieces. The watch will be available from May 2018.

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The bezel, hour markers and hands are in 18k gold



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