Only then are they tested and selected, and only quartz oscillators that meet strict standards are used in the 9F quartz movement. Grand Seiko was the first watchmaker in the world to utilize quartz oscillators selected through this process.Īs part of the process, quartz oscillators made in-house are first 'aged' for three months, during which they are subjected to certain voltages so that their characteristics stabilize. SEIKO SBTR029 mens male Spirit Quartz Chronograph Watch Shipped from Japan 65 400+ viewed in past week 14999 Was: 162.00 FREE delivery Tue, May 16 Or fastest delivery Mon, May 15 Only 4 left in stock - order soon. Recognizing this, Grand Seiko introduced an aging process for its chosen crystals to ensure that the oscillators stabilize before being used. Chronograph up to 60 minutes Tachymeter Date display Pullout crown. Other oscillators may perform with high precision at first, but undergo change in their oscillation over the years leading to inaccuracy. Seiko Chronograph SSB397P1 100M Tachymeter Analogue Quartz Mens Watch (Black). The accuracy of a quartz watch depends on whether the quartz oscillator can maintain a precise rate of 32,768 oscillations per second.ĭespite the overall regularity of this oscillation, each quartz oscillator has different performance characteristics, with some unable to maintain stable performance during the course of long use and changes in the environment. This is made possible by the selection of highly stable quartz crystals that are put through a rigorous aging process. ![]() QUALITY The 3-month aging process for quartz oscillatorsĬaliber 9F delivers an exceptional precision rate of ☑0 seconds per year. Seiko Neo Sports Chronograph Black Dial Quartz SSB397 SSB397P1 SSB397P 100M Mens Watch. Seiko SSB359P1 Sports Quartz Chronograph Black Dial Hardlex Crystal Glass Black Nylon-Topped Leather Strap Mens Watch Japan Made Quartz Movement (Calibre.
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