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The Spring Drive movement was announced publicly in 1997 and presented at the 1998 Basel Watch Fair. [1] [8] In 1999, the first production models were made available in Japan as limited edition, manual-wind watches in both the Credor and Seiko brands. [2] [5] [8] The first non-limited model was released in Japan in 2002. [5]
Some Grand Seiko timepieces also incorporate the company's Spring Drive movement, a movement that is a combination of both automatic and quartz timekeeping methods, leading to unparalleled accuracy in the world of automatic wristwatches. The most famous example is the SBGA011 Grand Seiko "Snowflake", housing the 9R Spring Drive movement.
Today Seiko offers a wide range of watches with various Kinetic movements. The top of the line is the caliber 9T82, included in Sportura (international brand) and PROSPEX (only marketed in Japan) Collection. It is sold in limited volume at a price range of about US$3000 which makes it one of the most expensive automatic quartz watches. Kinetic ...
Seiko's efforts to combine the quartz and mechanical movements bore fruit after 20 years of research, leading to the introduction of the Seiko Spring Drive, first in a limited domestic market production in 1999 and to the world in September 2005. The Spring Drive keeps time within quartz standards without the use of a battery, using a ...
Elgin pocketwatch mainsprings from around 1910, showing the three types (l-r): spiral, semi-reverse, reverse. A modern watch mainspring is a long strip of hardened and blued steel, or specialised steel alloy, 20–30 cm long and 0.05-0.2 mm thick.
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