Sellita Sw200 Vs Sw200 1

Sellita Caliber SW200 VS SW200-1

Sellita Sw200 Vs Sw200 1

What is the difference between Sellita caliber SW200 and SW200-1?

In 2008, Sellita published a document about the evolution of the caliber SW200 automatic mechanism to the SW200-1.

According to watch movement manufacturer, the goal for the change is to:

Minimize wear and tear of the wheels in the automatic chain changing the tooth profile.

Which parts were changed?

The changes to the -1 variation include making modifications to the following components of the movement:

  • Axis of reduction wheel (1481)
  • Axis and wheel of ratchet wheel driving wheel (1482)
  • Ratchet wheel (415)

Sellita Sw200 1 Differences

According to the documentation, other than the three components pictured above, all other parts of the caliber SW200 are interchangeable with the SW200-1. When performing maintenance or repair, these three components should be changed together to maintain functionality of the gear chain.

Technical Explanation:

The gears on the original SW200 are following normal standards, however, Sellita found that each individual tooth has “slim geometry” and have been known to get damaged due to strong shocks to the watch. The new gear design provides power transmission equal to the SW200, but they strengthened the tooth geometry to reduce the risk of damage from strong shock.

Sellita Sw200 1 Gears

The change of version is part of our ongoing improvement strategy to optimize the performance of our calibers. -Sellita

Unresolved Issues?

Despite the evolution and changes from SW200 to SW200-1, the same issues are still being experienced with the teeth being broken off of the ratchet wheels/gears as a result of hand-winding the movement.

Below is a picture of an SW200-1 ratchet wheel found in a microbrand watch that was produced in 2019.

Sellita Sw200 1 Ratchet Wheel Winding Gear Damaged

The wheel on the left was the damaged part that came in the watch. The wheel to the right was the new part ordered for the repair.

Sellita Sw200 1 Ratchet Wheel Winding Gear Teeth

To remedy this issue, you will need a new ratchet wheel. This is what an original and authentic part #415 looks like from Sellita.

Comment below if you have experienced this issue in your watch. Please be as specific as possible: brand, how often you hand wind, when the teeth became damaged, etc.

When did Sellita SW200 become SW200-1?

As mentioned above, Sellita began this change as far back as 2008. There is some confusion online about this date because the top of Sellita’s tech sheets say “R&D 08.04.13.” This was likely a revision date. The date of the actual document was 19.08.2008 (August 19, 2008). Sellita no longer provides tech sheets for the SW200, but the most recent one we found was from 2007. We also found an SW200-1 tech sheet from 2010. Therefore, it turns out that the SW200-1 is what most of the watch community is used to.

Additional Resources:


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STP and Soprod Movement Sources - Page 3
3 years ago

[…] wouldn't mind betting the parts are interchangable. Any link to show exactly what they've done? Sellita Caliber SW200 VS. SW200-1 Watch Movement | CaliberCorner.comhttps://forums.watchuseek.com/f2/sel…-a-873049.html Reply With […]

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Sellita Caliber SW200-1 Watch Movement | CaliberCorner.com
2 years ago

[…] Sellita SW200 VS SW200-1 […]

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2 years ago

[…] Sellita SW200 VS SW200-1 […]

Duong Dragon
Duong Dragon
1 year ago

i using Bulova Precision 362 khz with it’s second hand sweeping very very smoothy, and accuracy 5s/ 365 days. Now, It has no comparatives in the Switzerland and wide world. Its most precious!!!!

MasterWatcher
MasterWatcher
1 year ago
Reply to  Duong Dragon

I think you mean 262 kHz. They don’t make 362 kHz right? And you should post your comment in the Bulova thread. https://calibercorner.com/bulova-caliber-p102/

MND2955
MND2955
1 year ago
Reply to  Duong Dragon

It’s 262.144 kHz. And I think this in the wrong section because this comment has nothing to do with Sellita’s SW200 movements.

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Sellita Caliber SW200-1 Watch Movement | Caliber Corner
1 year ago

[…] evolution from SW200 to SW200-1 was supposed to fix an issue with the teeth of the ratchet wheel breaking off while hand-winding […]

MND2955
MND2955
1 year ago

I still have an old Invicta with the original SW200 I believe. It has never been serviced and still runs but doesn’t get much wrist time so I don’t know if it is accurate. I just picked up a Farer Beagle II with the SW200-1 and so far running strong no issue.

Tom
Tom
1 year ago

Movement is a pain generally to repair if you ask me. 9 series Miyota seems a much better alternative.

nenmayk
nenmayk
1 year ago

have an identical problem in a eta2824-2 ….. not really winding a lot

DJ
DJ
1 year ago

As I commented on another thread on the site: I have 4 watches with Sellita movements. 2 Bulova Accuswiss Tellaros, 1 Glycine Combat Sub and 1 Glycine Combat Classic. I hand-wind daily. The first Tellaro broke about 6 months into ownership, the second less than a month into ownership, and the Combat Sub after a year and a half although to be fair, I wore this one quite a bit more than the rest too.… Read more »

Sullivan S
Sullivan S
9 months ago
Reply to  DJ

Why are you hand winding them every day? The point of an automatic is they wind themselves. I suggest you hand wind mechanical watches and leave the automatics to wind themselves. Of course when you wear ur watch you need to set it and wind 10-20 times to get it going, but other than that is unnecessary to wind them every day. Just a suggestion Btw I have Japanese and swiss movement watches and none… Read more »

James
James
3 months ago
Reply to  DJ

Then it’s just coincidence that your Sellita watches have issues. Issues caused by you hand winding every day, they aren’t build for that. ETA are the same. Sadly you have caused yourself a lot if hassle because you didn’t do your due diligence.

Shadezzz
Shadezzz
1 year ago

I recently bought a Glycine Combat Sub with a Sellita SW200-1 based movement (I think Glycine only changes the rotor), would it help not to handwind it to prevent breaking the gears? It won’t get a whole lot of wristtime and will be on a watchwinder most of the time anyway, I’m already worried about breaking it after reading this page. I returned a watch with an SW200 movement years ago because of this problem,… Read more »

James
James
3 months ago
Reply to  Shadezzz

It’s not a common issue when you look at the number of SW200 and ETA 2824 movements produced. Most people wear 1 watch and don’t need to hand wind it regularly. Unfortunately like the the person above, you have caused your own problem by returning what was in all likelihood a good watch because you have not understood the information available. Watch winders are another kettle of fish, they will cause undue wear and will… Read more »

Nuno
Nuno
9 months ago

Top

David
David
2 months ago

The damage visible on the ratchet wheel above looks, to me, like an abusive relationship. The force needed to shear away those gear teeth is high and would indicate, to me, a careless owner. Many of the remaining teeth also show damage, but below the point of destruction. That watch was likely owned by a gorilla.

I Am Watcher
I Am Watcher
2 months ago
Reply to  David

Nope, it is a common issue, you are implying that every owner of a watch with such a movement is a gorilla. It’s simply a matter of material weakness…

David
David
2 months ago
Reply to  I Am Watcher

I’m not implying anything. If there is an implication being made, you are implying this always happens with SW200-1 movements — which we know if far from true. This watch engine has a generally positive reputation as a “workhorse” movement and that would not be the case if this type of damage was common. Many established watchmakers stake their reputations on this movement, and again, they would not do so if this degree of material… Read more »

Eli
Eli
15 days ago

Hi, I am planning to buy Chase Durer conquest automatic and it has calibre sw200 cosc chronometer officially certified. But my worry is the issue with the teeth as mentioned in the article . Also is those parts are available and are they costly to repair ? Is it worth it to buy this watch ? Thanks .

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