■INTRODUCTION - Spring drive watch –

Thank you for purchasing the Grand Seiko Spring Drive automatic winding Model.

The Spring Drive is Seiko’s unique mechanism in which the mainspring is wound by the natural motions of the user and accuracy is controlled by a microelectronics quartz mechanism while using the unwinding power of the mainspring to move the hands.

The Spring Drive powered by natural motions of the user can be called a watch that strongly combines and connects the user with the latest advancements in technology.

A mechanical watch of taste and refinement with an accuracy equivalent to a quartz watch, this sophisticated and innovative watch ticks in step with the pace of a person’s life.

This is a watch that creates a lifestyle for modern individuals who seek affluence and convenience in their life.

That is what the Grand Seiko Spring Drive automatic winding model is all about.

History of Spring Drive

Decades-long dream lives in the Grand Seiko

Grand Seiko’s history symbolizes the culmination of efforts and development aiming for better practical watches.

The Grand Seiko watch was born in 1960, reached the very top in the mechanical watch field around the world at the end of the 1960’s. After a hiatus of dozen years or so, in 1993, the Grand Seiko 9F series equipped with world-class quartz movement was released. In 1998, the 9S series mechanical movement that combined traditional craftsmanship and advanced technology was developed to reintroduce the Grand Seiko mechanical caliber. While using the unwinding power of the mainspring as its sole power source, the new mechanism Spring Drive realizes an average monthly rate of ±15 seconds (For Cal. 9R15, ±10 seconds), substantially exceeding the accuracy of conventional mechanical watches. The watch also embodies the concepts of Grand Seiko that continues the challenge of creating the best practical watch.

1960

Released the first Grand Seiko.

1964

Participated in the Neuchatel Observatory Competition in Switzerland

 

 

for the first time.

1968

Released Japan’s first automatic winding 10-beat model, 61GS.

1968

Won the first prize in the mechanical wrist chronometer category of

 

 

the Geneva Observatory Competition in Switzerland.

1978

Filed a patent for the Spring Drive mechanism for the first time.

1982

Filed a patent for the Spring Drive mechanism (registered). Started

 

 

initial development.

1988

Released the first Grand Seiko quartz caliber.

1993

Started the second development of the Spring Drive.

 

Released the Grand Seiko 9F series equipped with world-class

 

 

quartz movement.

1997

Started the third development of the Spring Drive.

 

Released technological announcement of the Spring Drive at the

 

 

Swiss Society of Chronometry (SSC).

1998

Exhibited the Spring Drive at BASELWORLD.

 

Released the Grand Seiko 9S series mechanical caliber combining

 

 

traditional craftsmanship and advanced technology.

1999

Released the manual-winding Spring Drive (CAL.7R68) limited

 

 

edition from SEIKO.

2000

Started the fourth development of the Spring Drive.

2002

Released the manual-winding Spring Drive (CAL.7R88) from CREDOR.

2004

Released the Grand Seiko automatic winding Spring Drive (CAL.9R65).

 

 

 

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Seiko 9R65, 9R15 manual History of Spring Drive

9R15, 9R65 specifications

The Seiko 9R series is a remarkable line of mechanical watches featuring Spring Drive technology, a hallmark of precision and innovation. Among its esteemed models, the 9R65 and 9R15 movements stand out for their unique characteristics and advancements.

The 9R65 movement is known for its impressive power reserve of up to 72 hours, which is significant for a watch powered by a spring-driven mechanism. This makes it extremely reliable for everyday wear, as users can take the watch off for a weekend without worrying about it stopping. One of the most notable features of the 9R65 is its smooth and continuous movement of the second hand, a signature of Spring Drive technology. Instead of ticking like traditional mechanical watches, the 9R65 provides a seamless glide, offering a visual experience that is both captivating and elegant.

On the other hand, the 9R15 movement, while sharing some similarities with the 9R65, takes the craftsmanship a step further with its chronograph function. This feature allows users to accurately measure elapsed time, making it ideal for sports enthusiasts and those who require precision timing. The 9R15 has a power reserve of approximately 60 hours, ensuring that it maintains its functionality over an extended period. Its robust design is complemented by the familiar Spring Drive mechanism, ensuring that while it offers additional functionality, it does not compromise on the smoothness and reliability typical of Seiko.

Both movements utilize Seiko’s advanced Spring Drive technology, which combines the best elements of mechanical and quartz watchmaking. This unique hybrid system allows for unparalleled accuracy, with variations of just one second per day, which is exceptional for a mechanical watch. Furthermore, the 9R series features a durable construction, incorporating high-quality materials such as stainless steel and ceramic, enhancing their longevity and resistance to wear.

In conclusion, the Seiko 9R65 and 9R15 movements exemplify the brand’s commitment to innovation, precision, and durability. Whether you prefer the minimalist elegance of the 9R65 or the added complexity of the chronograph in the 9R15, both options promise an exceptional blend of technology and artistry that showcases Seiko's prowess in horology. These movements not only cater to the demands of modern watch enthusiasts but also pay homage to the intricate traditions of watchmaking, making them a desirable choice for collectors and aficionados alike.