If it is a seiko mechanical watch, you can see the movement number on the pendulum in the transparent glass behind the watch. Seiko watch has one card and one watch, that is, each watch has only one warranty card, and the number of the watch is on the side of the case. It is the same as the warranty card I gave you when I bought it.
Seiko 5 at the top of the front indicates that this watch belongs to the sequence of Seiko 5 shield and is an entry-level mechanical watch aimed at the low-end market. AUTOMATIC tells the buyer that this mechanical watch is automatically wound and then drives the hands away.
2 1 gem means that there are 2 1 artificial ruby bearings in a mechanical movement.
Extended data:
Seiko watch system classification:
1, manual power
A power plant with innovative technology.
Kinetic energy manual electric energy is a kind of power transmission system, just like mechanical energy and timely energy.
In the past 20 years, SEIKO has launched many watch products based on kinetic energy and manual electric energy, each of which makes consumers experience its uniqueness.
As early as 1986 in Basel, Switzerland, Seiko launched the first kinetic manual electric energy prototype, temporarily named "AGM", which was the first wristwatch in the world to convert human motion into electric energy at that time.
After taking this first step, after 20 years of development, kinetic manual electric energy has become synonymous with environmental protection, high performance and durability for many users around the world.
Since 1988 (with the new name AGS at that time) officially launched the first watch, the cumulative sales of Kinetic manual electric watches have exceeded 8 million (as of 2007).
1998, Seiko introduced Kinetic Auto Relay, which extended the "sleep energy saving" mode of watches to an amazing four years. During these four years, the watch can be activated at any time, thus automatically returning to the current accurate time.
1999, we witnessed the birth of the ultimate dynamic chronograph watch, which is an outstanding work combining precision machinery and spreadsheet technology. In 2003, another dynamic chronograph was introduced.
At the 2005 Basel World Expo, the kinetic energy perpetual calendar made its debut, combining the convenience of the kinetic energy perpetual calendar with the perpetual calendar that does not need to be adjusted before 2 100. In 2007, the crystallization of Seiko humanized technology: kinetic energy direct drive (manual electric energy, which can be manually charged) came out.
2. Type of machinery
Seiko automatic movement 6R20 is a high-standard movement, which makes Seiko occupy a stable position in the market of high-quality mechanical watches.
Except ruby, all components of 6R20 sports movement are made by Seiko Electronics Co, Ltd..
The manufacturing process of the movement is precise, including a carved pendulum. The edge of the automatic splint is polished, and most of the surface is polished by hair.
The high-speed (28,800 rpm) movement can achieve the accuracy of-15 to +25 seconds per day. Spron 5 10* clockwork can generate energy storage and make the watch work for more than 45 hours.
3. Timely style
Seiko is passionate about watchmaking technology, and the quartz watches it produces have brought great revolution to the development history of watches. The quartz watch developed by 1969 subverts the traditional watch concept and brings revolutionary changes to the watchmaking industry.
The crystal oscillator is installed at the core of this watch to ensure its accuracy. A crystal cut into a fixed shape has a characteristic that when a voltage is applied to it, the crystal will generate stable vibration.
For many years, it has been widely known that the standard mode of synchronous crystal oscillator uses the electric energy characteristics of crystal to ensure the accuracy of time and speed. However, there are still many technical problems to be solved in order to fully apply the advantages of timely crystal in precision to watches.
1969, Seiko successfully solved all the problems and introduced its first watch product to the world for the first time.
It took 10 years from the research and development plan of Suwa Seiko Co., Ltd. to the appearance of the first watch.
In order to make quartz watches practical, Seiko has created a unique technology. For example, adjust the cutting shape of the timely crystal to the style of a tuning fork; By developing IC (integrated circuit) and stepping motor (which can run once per second), we can make better use of the signal from the crystal oscillator and run accurately.
In addition, with the passion of changing the future watch manufacturing technology, Seiko did not monopolize its own unique technology on the patent issue, but made it public to the world.
Soon after, many technologies provided by Seiko became the worldwide watchmaking standards, and today, these technologies are still contributing to the development of quartz watch manufacturing industry.
Baidu encyclopedia _ seiko watch