A complete guide to Sellita SW200
Sellita SW200 is a reliable Swiss made automatic movement. Many famous watch brands use the Sellita SW200 movement as an alternative to the ETA 2824 movement. In this blog, we will discuss various aspects of Sellita to help you fully understand the SW200 movement.
Table of Contents
Sellita SW200
SW200 is a very stable automatic movement with a frequency of 28,800 vibrations/hour and a very smooth running second hand. The SW200 features hour, minute and second hand plus a date display with a calendar window that can be set in 3, 6, 9 and 12 digits for quick date setting. In addition, sellita caliber sw200 is equipped with 26pcs jewel and ball bearing rotor. Sellita S200 movement specification is below.
Sellita SW200 Grade
Sellita SW200 is available in 4 different grades, each with a different level of precision and finish. These grades are Standard, Special, Premier and Chronometer.
Standard: adjustable in two positions; accuracy from +/-12 seconds/day to +/- 30 seconds/day
Special ：adjustable in three positions; accuracy from +/- 7 seconds/day to +/- 20 seconds/day
Premium ：adjustable in five positions accuracy from +/- 4 sec/day to +/- 15 sec/day for greater precision and superior craftsmanship.
Chronometer: This is the highest grade for the Sellita SW200 movement. The COSC (Swiss Official Chronometer Testing Institute has certified it) for extreme accuracy and precision. We reserve this grade for Haute Horlogerie.
CROWN/STEM REMOVAL
To remove the crown and stem, proceed as follows:
- Unscrew the crown counterclockwise until it is in the fully extended position.
- Gently pull the crown out to the second position (date setting position).
- Press the small lever near the stem to release the stem from the movement.
- After releasing the stem, cautiously extract it from the movement.
SW200 and SW200-1 issue
SW200 and SW200-1 ratchet wheel tooth problems are when the watch will feel slippery when winding and cannot transfer all of its energy to the mainspring, resulting in a sharp drop in the watch’s power reserve or the watch stopping. If this problem occurs, it is necessary to have the movement disassembled and the ratchet wheel replaced by a professional. To avoid ratchet problems as much as possible, avoid forceful or excessive manual winding and minimize manual winding of the SW200.
In 2008, Sellita evolved from the SW200 movement to the SW200-1 by changing the shape of the teeth in order to minimize wear and tear on the automatic sprocket wheels. So what were the changes?
Change the movement components
The reduction wheel spindle (1481), the ratchet drive wheel spindle and the wheel (1482) and ratchet wheel (415) were changed, while we can interchange the other movement components between the two calibers.
Change of tooth shape
Changing the geometry of the gears reduces the risk of damage because of strong shocks, while guaranteeing the same power transportation, as shown in the following diagram.
However, after the change from SW200 to SW200-1, the problem of the teeth of the gears being broken still cannot be solved.
ETA2824 and sellita sw200 are both Swiss made, both are basically the same in all aspects of the parameters such as accuracy. Seliita sw200 is better is sw200 price is slightly lower than eta2824, but the number of jewels in SW200 is 26 pcs while the number of jewels in 2824 is 25. For the consumer, a watch with more jewels can be purchased at a lower cost.
SW200-1 is a clone of the Swiss ETA2824-2 movement, while the SW300-1 is a clone of the EAT2829-2 movement.There are many similarities between the SW200-1 and the SW300-1, but the difference between the two is that the SW300-1 is 1mm thinner than the SW200-1 movement. The thickness of the SW200-1 is 4.6mm, while the thickness of the SW300-1 is 3.6mm, so the SW300-1 caliber can fit inside a thin case.
In summary, Sellita SW200 is a versatile and reliable automatic movement available in different grades to meet a variety of watchmaking needs. Understanding the different grades, the crown/stem removal process, and the differences between the SW200-1 and SW200 movements will help you make an informed decision when selecting and maintaining a watch that uses this movement. While the ratchet wheel tooth issue may present a challenge, it is a minor drawback to a significant movement. By choosing the sw200 watch movement, you can enjoy accurate timekeeping and reliable performance.
As a professional watch supplier, we can provide various styles of watches with Sellita movements, as well as customized watches with Sellita movements.
Hello,customers
My name is Momo Cheng. I am the business manager of Watchessy. have been in watches industry since 2012. Feel free to contact us. I am happy to provide your the professional solution, the best watches products and service.
Email : info@watchessy.com
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