Tudor Caliber T601

The Tudor caliber T601 is a Swiss made automatic movement with 25 or 26 jewels. Some of the topics covered in this caliber listing: Tudor T600 AKA 2824-2 / SW200-1 So which one is it… ETA or Sellita? What modifications made by Tudor? Is it an officially certified chronometer? Caliber T601 Warranty Recommended Service Intervals List of Tudor watches with caliber T601 There is a similar Tudor caliber T600. There are watch articles online stating that the difference between the caliber numbers T600 and T601 is that one is based on the ETA 2824-2 and the other is a Sellita SW200-1. This appears to be incorrect. In the current (2021) Tudor catalog, all of the T600 watches are no-date models, whereas the T601 watches have a date. Nowhere in Tudor’s marketing information do they assert that the distinction between these calibers is the base movement used. We’re not sure where big watch media is getting their information. We have an email out to Tudor for confirmation and will update this post if any clarity is provided. The T600 is said to be based on either an ETA 2824-2 or a Sellita SW200-1. You may see other sites incorrectly list the T601 as being based on a Sellita 2834 or ETA 2429. There is no such thing as a Sellita 2834 or ETA 2429. There is an ETA 2824-2 which the Sellita SW200-1 is a clone of. Therefore, if you get a T601 based on a Sellita SW200-1, then perhaps it can be called a clone of a clone. Tudor used to refer to their ETA 2824-2 based movements as Tudor 2824. In 2020 the name changed to T601. Perhaps this was a way for them to deal with the fact they were starting to use Sellitas. If this is the reason behind the new naming convention, it would have been nice for Tudor to disclose the use of Sellita movements since many collectors expect their non-in-house movement Tudors to have an ETA inside. Which one you get may be completely random.

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