![]() This wheel is attached to the barrel’s arbor via a single screw. The gold tone ratchet wheel with 63 teeth is located above the mainspring barrel. Hence, the suggestion to minimize manual (and unregulated) winding of the SW200-1. Aggressive or excessive force is subjective, but what is generally not as subjective is the function of the automatic winding unit, which delivers a more consistent and regulated dose of energy to the ratchet wheel. This isn’t to say one should avoid the SW200-1, but it is advisable to avoid aggressively or excessively hand-winding your SW200-1 watches as much as possible. Regardless, the ratchet wheel teeth issue that was supposed to be remedied in the original SW200 is still experienced in the SW200-1. Likewise, experiences with the ETA 2824-2 having similar issues is also split with some saying they have experienced it, and others pointing to how ETA holds a patent for a ratchet wheel that is less prone to teeth stripping by design. There are skeptics who question whether these problematic parts are a direct result of hand-winding, but as with many topics in the watch community, it is a topic that is debated between those who have experienced the issue (or repaired the issue) and those who have not. The primary reason behind the evolution from SW200 to SW200-1 was to fix an issue with the teeth of the ratchet wheel breaking off, perhaps while hand-winding the movement. Use a 1mm screw-driver, avoid using tweezers or any other tool with a point because this could jam the setting lever and damage the setting lever spring. Official Sellita documentation states that the crown should be in the time setting position before being extracted. For reference:Ī 2-digit customer service code is engraved to show that the movement has been renewed.Ĭase study pics coming soon. We still don’t know, but please check your movement for a two digit number starting with 2X. Perhaps brands are able to buy them at a discount. The meaning of this still needs to be confirmed, but it appears that this is for movements that were sent back to Sellita for renewal. There is also a code for what Sellita refers to as “Renewed Movements”. XYZ is a Sellita code (we’re not sure the meaning, comment below if you know)Īs for the date part of the code, new movements produced in 2018 look like this:.DM means that the movement origin is from Sellita Watch Co (where else would it be from we’re not sure).Under the balance wheel, near the caliber number engraving, you may have seen what looks to be a laser etched code containing DM and XYZ. This page explains more about how Sellita grades their movements and the differences between them. ![]() Premium (Top) – adjusted in five positions accuracy of +/-4 sec/day up to +/- 15 sec/day. ![]()
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